diff --git a/CMake/CurlTests.c b/CMake/CurlTests.c
index 8666da0da9..e418146b48 100644
--- a/CMake/CurlTests.c
+++ b/CMake/CurlTests.c
@@ -229,6 +229,10 @@ int main () { ; return 0; }
 #  include <windows.h>
 #  ifdef HAVE_WINSOCK2_H
 #    include <winsock2.h>
+#  else
+#    ifdef HAVE_WINSOCK_H
+#      include <winsock.h>
+#    endif
 #  endif
 #endif
 
@@ -254,6 +258,10 @@ main ()
 #  include <windows.h>
 #  ifdef HAVE_WINSOCK2_H
 #    include <winsock2.h>
+#  else
+#    ifdef HAVE_WINSOCK_H
+#      include <winsock.h>
+#    endif
 #  endif
 #endif
 
@@ -277,6 +285,10 @@ main ()
 #  include <windows.h>
 #  ifdef HAVE_WINSOCK2_H
 #    include <winsock2.h>
+#  else
+#    ifdef HAVE_WINSOCK_H
+#      include <winsock.h>
+#    endif
 #  endif
 #endif
 
@@ -301,6 +313,10 @@ main ()
 #  include <windows.h>
 #  ifdef HAVE_WINSOCK2_H
 #    include <winsock2.h>
+#  else
+#    ifdef HAVE_WINSOCK_H
+#      include <winsock.h>
+#    endif
 #  endif
 #endif
 
@@ -387,6 +403,10 @@ main ()
 #  include <windows.h>
 #  ifdef HAVE_WINSOCK2_H
 #    include <winsock2.h>
+#  else
+#    ifdef HAVE_WINSOCK_H
+#      include <winsock.h>
+#    endif
 #  endif
 #endif
 /* includes start */
diff --git a/CMake/OtherTests.cmake b/CMake/OtherTests.cmake
index 73c813fe51..5cddf4afa9 100644
--- a/CMake/OtherTests.cmake
+++ b/CMake/OtherTests.cmake
@@ -33,6 +33,7 @@ set(signature_call_conv)
 if(HAVE_WINDOWS_H)
   add_header_include(HAVE_WINSOCK2_H "winsock2.h")
   add_header_include(HAVE_WINDOWS_H "windows.h")
+  add_header_include(HAVE_WINSOCK_H "winsock.h")
   set(_source_epilogue
       "${_source_epilogue}\n#ifndef WIN32_LEAN_AND_MEAN\n#define WIN32_LEAN_AND_MEAN\n#endif")
   set(signature_call_conv "PASCAL")
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 58e3c03668..cf9c390c3d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -910,6 +910,7 @@ endif()
 # Check for header files
 if(NOT UNIX)
   check_include_file_concat("windows.h"      HAVE_WINDOWS_H)
+  check_include_file_concat("winsock.h"      HAVE_WINSOCK_H)
   check_include_file_concat("ws2tcpip.h"     HAVE_WS2TCPIP_H)
   check_include_file_concat("winsock2.h"     HAVE_WINSOCK2_H)
   check_include_file_concat("wincrypt.h"     HAVE_WINCRYPT_H)
diff --git a/acinclude.m4 b/acinclude.m4
index 643b6bb42b..277902daca 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -235,6 +235,43 @@ AC_DEFUN([CURL_CHECK_NATIVE_WINDOWS], [
 ])
 
 
+dnl CURL_CHECK_HEADER_WINSOCK
+dnl -------------------------------------------------
+dnl Check for compilable and valid winsock.h header
+
+AC_DEFUN([CURL_CHECK_HEADER_WINSOCK], [
+  AC_REQUIRE([CURL_CHECK_HEADER_WINDOWS])dnl
+  AC_CACHE_CHECK([for winsock.h], [curl_cv_header_winsock_h], [
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM([[
+#undef inline
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#include <winsock.h>
+      ]],[[
+#if defined(__CYGWIN__) || defined(__CEGCC__)
+        HAVE_WINSOCK_H shall not be defined.
+#else
+        int dummy=WSACleanup();
+#endif
+      ]])
+    ],[
+      curl_cv_header_winsock_h="yes"
+    ],[
+      curl_cv_header_winsock_h="no"
+    ])
+  ])
+  case "$curl_cv_header_winsock_h" in
+    yes)
+      AC_DEFINE_UNQUOTED(HAVE_WINSOCK_H, 1,
+        [Define to 1 if you have the winsock.h header file.])
+      ;;
+  esac
+])
+
+
 dnl CURL_CHECK_HEADER_WINSOCK2
 dnl -------------------------------------------------
 dnl Check for compilable and valid winsock2.h header
@@ -1021,6 +1058,10 @@ AC_DEFUN([CURL_CHECK_FUNC_RECV], [
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
 #endif
 #else
 #ifdef HAVE_PROTO_BSDSOCKET_H
@@ -1065,6 +1106,10 @@ struct Library *SocketBase = NULL;
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
 #endif
 #define RECVCALLCONV PASCAL
 #else
@@ -1142,6 +1187,7 @@ dnl return value in SEND_TYPE_RETV, and also defining the
 dnl type qualifier of second argument in SEND_QUAL_ARG2.
 
 AC_DEFUN([CURL_CHECK_FUNC_SEND], [
+  AC_REQUIRE([CURL_CHECK_HEADER_WINSOCK])dnl
   AC_REQUIRE([CURL_CHECK_HEADER_WINSOCK2])dnl
   AC_CHECK_HEADERS(sys/types.h sys/socket.h)
   #
@@ -1156,6 +1202,10 @@ AC_DEFUN([CURL_CHECK_FUNC_SEND], [
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
 #endif
 #else
 #ifdef HAVE_PROTO_BSDSOCKET_H
@@ -1200,6 +1250,10 @@ struct Library *SocketBase = NULL;
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
 #endif
 #define SENDCALLCONV PASCAL
 #else
@@ -1314,6 +1368,10 @@ AC_DEFUN([CURL_CHECK_MSG_NOSIGNAL], [
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
 #endif
 #else
 #ifdef HAVE_PROTO_BSDSOCKET_H
@@ -1350,6 +1408,7 @@ dnl -------------------------------------------------
 dnl Check for timeval struct
 
 AC_DEFUN([CURL_CHECK_STRUCT_TIMEVAL], [
+  AC_REQUIRE([CURL_CHECK_HEADER_WINSOCK])dnl
   AC_REQUIRE([CURL_CHECK_HEADER_WINSOCK2])dnl
   AC_CHECK_HEADERS(sys/types.h sys/time.h sys/socket.h)
   AC_CACHE_CHECK([for struct timeval], [curl_cv_struct_timeval], [
@@ -1363,6 +1422,10 @@ AC_DEFUN([CURL_CHECK_STRUCT_TIMEVAL], [
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
 #endif
 #endif
 #ifdef HAVE_SYS_TYPES_H
@@ -1418,6 +1481,9 @@ AC_DEFUN([TYPE_IN_ADDR_T], [
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
 #endif
 #endif
 #else
@@ -1461,6 +1527,10 @@ AC_DEFUN([TYPE_IN_ADDR_T], [
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
 #endif
 #else
 #ifdef HAVE_SYS_TYPES_H
@@ -1753,6 +1823,10 @@ AC_DEFUN([CURL_CHECK_FUNC_SELECT], [
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
 #endif
 #endif
 #ifdef HAVE_SYS_TYPES_H
@@ -1807,6 +1881,10 @@ struct Library *SocketBase = NULL;
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
 #endif
 #define SELECTCALLCONV PASCAL
 #endif
diff --git a/configure.ac b/configure.ac
index 37cf62b566..152b0472eb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -477,7 +477,7 @@ dnl Compilation based checks should not be done before this point.
 dnl **********************************************************************
 
 dnl **********************************************************************
-dnl Make sure that our checks for headers windows.h winsock2.h
+dnl Make sure that our checks for headers windows.h winsock.h winsock2.h
 dnl and ws2tcpip.h take precedence over any other further checks which
 dnl could be done later using AC_CHECK_HEADER or AC_CHECK_HEADERS for
 dnl this specific header files. And do them before its results are used.
@@ -487,6 +487,7 @@ CURL_CHECK_HEADER_WINDOWS
 CURL_CHECK_NATIVE_WINDOWS
 case X-"$curl_cv_native_windows" in
   X-yes)
+    CURL_CHECK_HEADER_WINSOCK
     CURL_CHECK_HEADER_WINSOCK2
     CURL_CHECK_HEADER_WS2TCPIP
     CURL_CHECK_HEADER_WINCRYPT
@@ -494,6 +495,7 @@ case X-"$curl_cv_native_windows" in
     CURL_CHECK_HEADER_WINBER
     ;;
   *)
+    curl_cv_header_winsock_h="no"
     curl_cv_header_winsock2_h="no"
     curl_cv_header_ws2tcpip_h="no"
     curl_cv_header_wincrypt_h="no"
@@ -1020,6 +1022,16 @@ if test "$HAVE_GETHOSTBYNAME" != "1"
 then
   dnl This is for winsock systems
   if test "$curl_cv_header_windows_h" = "yes"; then
+    if test "$curl_cv_header_winsock_h" = "yes"; then
+      case $host in
+        *-*-mingw32ce*)
+          winsock_LIB="-lwinsock"
+          ;;
+        *)
+          winsock_LIB="-lwsock32"
+          ;;
+      esac
+    fi
     if test "$curl_cv_header_winsock2_h" = "yes"; then
       winsock_LIB="-lws2_32"
     fi
@@ -1036,6 +1048,10 @@ then
 #include <windows.h>
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
+#else
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
 #endif
 #endif
         ]],[[
diff --git a/lib/config-os400.h b/lib/config-os400.h
index d68cb4b18e..47b09465a1 100644
--- a/lib/config-os400.h
+++ b/lib/config-os400.h
@@ -328,6 +328,9 @@
 /* Define if you have the <unistd.h> header file. */
 #define HAVE_UNISTD_H
 
+/* Define if you have the <winsock.h> header file. */
+#undef HAVE_WINSOCK_H
+
 /* Define if you have the <x509.h> header file. */
 #undef HAVE_X509_H
 
diff --git a/lib/config-riscos.h b/lib/config-riscos.h
index 9986b20fba..6c6ff45ead 100644
--- a/lib/config-riscos.h
+++ b/lib/config-riscos.h
@@ -305,6 +305,9 @@
 /* Define if you have the <unistd.h> header file. */
 #define HAVE_UNISTD_H
 
+/* Define if you have the <winsock.h> header file. */
+#undef HAVE_WINSOCK_H
+
 /* Define if you have the <x509.h> header file. */
 #undef HAVE_X509_H
 
diff --git a/lib/config-tpf.h b/lib/config-tpf.h
index cce06cedd8..0562ec91e7 100644
--- a/lib/config-tpf.h
+++ b/lib/config-tpf.h
@@ -483,6 +483,9 @@
 /* Define to 1 if you have the <winsock2.h> header file. */
 /* #undef HAVE_WINSOCK2_H */
 
+/* Define to 1 if you have the <winsock.h> header file. */
+/* #undef HAVE_WINSOCK_H */
+
 /* Define this symbol if your OS supports changing the contents of argv */
 /* #undef HAVE_WRITABLE_ARGV */
 
diff --git a/lib/config-vxworks.h b/lib/config-vxworks.h
index af1d87345c..042e67ee97 100644
--- a/lib/config-vxworks.h
+++ b/lib/config-vxworks.h
@@ -601,6 +601,9 @@
 /* Define to 1 if you have the winsock2.h header file. */
 /* #undef HAVE_WINSOCK2_H */
 
+/* Define to 1 if you have the winsock.h header file. */
+/* #undef HAVE_WINSOCK_H */
+
 /* Define this symbol if your OS supports changing the contents of argv */
 #define HAVE_WRITABLE_ARGV 1
 
diff --git a/lib/config-win32.h b/lib/config-win32.h
index 89593a815d..b6a6ced599 100644
--- a/lib/config-win32.h
+++ b/lib/config-win32.h
@@ -132,6 +132,9 @@
 /* Define if you have the <windows.h> header file. */
 #define HAVE_WINDOWS_H 1
 
+/* Define if you have the <winsock.h> header file. */
+#define HAVE_WINSOCK_H 1
+
 /* Define if you have the <winsock2.h> header file. */
 #ifndef __SALFORDC__
 #define HAVE_WINSOCK2_H 1
@@ -378,6 +381,7 @@
 
 #ifdef USE_LWIPSOCK
 #  undef USE_WINSOCK
+#  undef HAVE_WINSOCK_H
 #  undef HAVE_WINSOCK2_H
 #  undef HAVE_WS2TCPIP_H
 #  undef HAVE_ERRNO_H
@@ -408,6 +412,7 @@
   #undef byte
   #undef word
   #undef USE_WINSOCK
+  #undef HAVE_WINSOCK_H
   #undef HAVE_WINSOCK2_H
   #undef HAVE_WS2TCPIP_H
   #define HAVE_GETADDRINFO
diff --git a/lib/config-win32ce.h b/lib/config-win32ce.h
index 889028b269..70b7ae7b5b 100644
--- a/lib/config-win32ce.h
+++ b/lib/config-win32ce.h
@@ -110,6 +110,9 @@
 /* Define if you have the <windows.h> header file.  */
 #define HAVE_WINDOWS_H 1
 
+/* Define if you have the <winsock.h> header file.  */
+#define HAVE_WINSOCK_H 1
+
 /* Define if you have the <winsock2.h> header file.  */
 #define HAVE_WINSOCK2_H 1
 
diff --git a/lib/connect.c b/lib/connect.c
index 48c98ebd45..d61b0374e3 100644
--- a/lib/connect.c
+++ b/lib/connect.c
@@ -85,7 +85,7 @@
 
 static bool verifyconnect(curl_socket_t sockfd, int *error);
 
-#if defined(__DragonFly__) || defined(HAVE_WINSOCK2_H)
+#if defined(__DragonFly__) || defined(HAVE_WINSOCK_H)
 /* DragonFlyBSD and Windows use millisecond units */
 #define KEEPALIVE_FACTOR(x) (x *= 1000)
 #else
diff --git a/lib/curl_config.h.cmake b/lib/curl_config.h.cmake
index d2a0f438cc..4ef4883b2c 100644
--- a/lib/curl_config.h.cmake
+++ b/lib/curl_config.h.cmake
@@ -710,6 +710,9 @@
 /* Define to 1 if you have the winsock2.h header file. */
 #cmakedefine HAVE_WINSOCK2_H 1
 
+/* Define to 1 if you have the winsock.h header file. */
+#cmakedefine HAVE_WINSOCK_H 1
+
 /* Define this symbol if your OS supports changing the contents of argv */
 #cmakedefine HAVE_WRITABLE_ARGV 1
 
diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index 3840636f64..99048c489a 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -717,6 +717,7 @@ int netware_init(void);
 #if defined(__LWIP_OPT_H__) || defined(LWIP_HDR_OPT_H)
 #  if defined(SOCKET) || \
      defined(USE_WINSOCK) || \
+     defined(HAVE_WINSOCK_H) || \
      defined(HAVE_WINSOCK2_H) || \
      defined(HAVE_WS2TCPIP_H)
 #    error "WinSock and lwIP TCP/IP stack definitions shall not coexist!"
diff --git a/lib/setup-win32.h b/lib/setup-win32.h
index 12d95e9d53..c35dec88cb 100644
--- a/lib/setup-win32.h
+++ b/lib/setup-win32.h
@@ -25,11 +25,11 @@
 /*
  * Include header files for windows builds before redefining anything.
  * Use this preprocessor block only to include or exclude windows.h,
- * winsock2.h or ws2tcpip.h. Any other windows thing belongs
+ * winsock2.h, ws2tcpip.h or winsock.h. Any other windows thing belongs
  * to any other further and independent block.  Under Cygwin things work
  * just as under linux (e.g. <sys/socket.h>) and the winsock headers should
  * never be included when __CYGWIN__ is defined.  configure script takes
- * care of this, not defining HAVE_WINDOWS_H, HAVE_WINSOCK2_H,
+ * care of this, not defining HAVE_WINDOWS_H, HAVE_WINSOCK_H, HAVE_WINSOCK2_H,
  * neither HAVE_WS2TCPIP_H when __CYGWIN__ is defined.
  */
 
@@ -47,6 +47,10 @@
 #    ifdef HAVE_WS2TCPIP_H
 #      include <ws2tcpip.h>
 #    endif
+#  else
+#    ifdef HAVE_WINSOCK_H
+#      include <winsock.h>
+#    endif
 #  endif
 #  include <tchar.h>
 #  ifdef UNICODE
@@ -63,6 +67,10 @@
 
 #ifdef HAVE_WINSOCK2_H
 #  define USE_WINSOCK 2
+#else
+#  ifdef HAVE_WINSOCK_H
+#    error "WinSock version 1 is no longer supported, version 2 is required!"
+#  endif
 #endif
 
 /*
diff --git a/m4/curl-functions.m4 b/m4/curl-functions.m4
index b21bbd1e20..d3ffaea9fe 100644
--- a/m4/curl-functions.m4
+++ b/m4/curl-functions.m4
@@ -486,7 +486,7 @@ curl_includes_unistd="\
 dnl CURL_INCLUDES_WINSOCK2
 dnl -------------------------------------------------
 dnl Set up variable with list of headers that must be
-dnl included when winsock2.h is to be included.
+dnl included when winsock(2).h is to be included.
 
 AC_DEFUN([CURL_INCLUDES_WINSOCK2], [
 curl_includes_winsock2="\
@@ -498,10 +498,15 @@ curl_includes_winsock2="\
 #  include <windows.h>
 #  ifdef HAVE_WINSOCK2_H
 #    include <winsock2.h>
+#  else
+#    ifdef HAVE_WINSOCK_H
+#      include <winsock.h>
+#    endif
 #  endif
 #endif
 /* includes end */"
   CURL_CHECK_HEADER_WINDOWS
+  CURL_CHECK_HEADER_WINSOCK
   CURL_CHECK_HEADER_WINSOCK2
 ])