diff --git a/lib/Makefile.netware b/lib/Makefile.netware
index a5e0345c9a..546086796d 100644
--- a/lib/Makefile.netware
+++ b/lib/Makefile.netware
@@ -454,6 +454,7 @@ ifdef ENABLE_IPV6
 	@echo $(DL)#define ENABLE_IPV6 1$(DL) >> $@
 	@echo $(DL)#define HAVE_FREEADDRINFO 1$(DL) >> $@
 	@echo $(DL)#define HAVE_GETADDRINFO 1$(DL) >> $@
+	@echo $(DL)#define HAVE_SIN6_SCOPE_ID 1$(DL) >> $@
 endif
 endif
 	@echo $(DL)#define USE_MANUAL 1$(DL) >> $@
diff --git a/lib/config-os400.h b/lib/config-os400.h
index 3a118796ac..dccf8a869e 100644
--- a/lib/config-os400.h
+++ b/lib/config-os400.h
@@ -42,6 +42,9 @@
 /* Define if you want to enable IPv6 support */
 #define ENABLE_IPV6
 
+/* Define if struct sockaddr_in6 has the sin6_scope_id member */
+#define HAVE_SIN6_SCOPE_ID 1
+
 /* Define this to 'int' if ssize_t is not an available typedefed type */
 #undef ssize_t
 
diff --git a/lib/config-riscos.h b/lib/config-riscos.h
index 82d579e53a..25097fb0bc 100644
--- a/lib/config-riscos.h
+++ b/lib/config-riscos.h
@@ -38,6 +38,9 @@
 /* Define if you want to enable IPv6 support */
 #undef ENABLE_IPV6
 
+/* Define if struct sockaddr_in6 has the sin6_scope_id member */
+#define HAVE_SIN6_SCOPE_ID 1
+
 /* Define this to 'int' if ssize_t is not an available typedefed type */
 #undef ssize_t
 
diff --git a/lib/config-symbian.h b/lib/config-symbian.h
index fb5dd23aae..cc9b03cb95 100644
--- a/lib/config-symbian.h
+++ b/lib/config-symbian.h
@@ -66,6 +66,9 @@
 /* Define if you want to enable IPv6 support */
 #define ENABLE_IPV6 1
 
+/* Define if struct sockaddr_in6 has the sin6_scope_id member */
+#define HAVE_SIN6_SCOPE_ID 1
+
 /* Define to the type qualifier of arg 1 for getnameinfo. */
 #define GETNAMEINFO_QUAL_ARG1 const
 
diff --git a/lib/config-tpf.h b/lib/config-tpf.h
index 67f9cbfefd..8524cda190 100644
--- a/lib/config-tpf.h
+++ b/lib/config-tpf.h
@@ -62,6 +62,9 @@
 /* Define if you want to enable IPv6 support */
 /* #undef ENABLE_IPV6 */
 
+/* Define if struct sockaddr_in6 has the sin6_scope_id member */
+/* #undef HAVE_SIN6_SCOPE_ID */
+
 /* Define to the type of arg 1 for getnameinfo. */
 /* #undef GETNAMEINFO_TYPE_ARG1 */
 
diff --git a/lib/config-win32ce.h b/lib/config-win32ce.h
index cd793d6ccf..65b00a1044 100644
--- a/lib/config-win32ce.h
+++ b/lib/config-win32ce.h
@@ -323,6 +323,9 @@
 /* Define this if you have struct timeval */
 #define HAVE_STRUCT_TIMEVAL 1
 
+/* Define this if struct sockaddr_in6 has the sin6_scope_id member */
+#define HAVE_SIN6_SCOPE_ID 1
+
 /* ---------------------------------------------------------------- */
 /*                        COMPILER SPECIFIC                         */
 /* ---------------------------------------------------------------- */
diff --git a/src/Makefile.netware b/src/Makefile.netware
index 6b02935f2b..6be299cf80 100644
--- a/src/Makefile.netware
+++ b/src/Makefile.netware
@@ -442,6 +442,7 @@ ifdef ENABLE_IPV6
 	@echo $(DL)#define ENABLE_IPV6 1$(DL) >> $@
 	@echo $(DL)#define HAVE_FREEADDRINFO 1$(DL) >> $@
 	@echo $(DL)#define HAVE_GETADDRINFO 1$(DL) >> $@
+	@echo $(DL)#define HAVE_SIN6_SCOPE_ID 1$(DL) >> $@
 endif
 endif
 	@echo $(DL)#define USE_MANUAL 1$(DL) >> $@
diff --git a/src/config-riscos.h b/src/config-riscos.h
index f8df38ed5c..0e6b3a19be 100644
--- a/src/config-riscos.h
+++ b/src/config-riscos.h
@@ -41,6 +41,9 @@
 /* Define if you want to enable IPv6 support */
 #undef ENABLE_IPV6
 
+/* Define if struct sockaddr_in6 has the sin6_scope_id member */
+#define HAVE_SIN6_SCOPE_ID 1
+
 /* Define this to 'int' if ssize_t is not an available typedefed type */
 #undef ssize_t
 
diff --git a/src/config-win32.h b/src/config-win32.h
index 0ca61cccf8..3b7dc58e8a 100644
--- a/src/config-win32.h
+++ b/src/config-win32.h
@@ -200,6 +200,9 @@
 /* Define this if you have struct timeval */
 #define HAVE_STRUCT_TIMEVAL 1
 
+/* Define this if struct sockaddr_in6 has the sin6_scope_id member */
+#define HAVE_SIN6_SCOPE_ID 1
+
 /* ---------------------------------------------------------------- */
 /*                        Watt-32 tcp/ip SPECIFIC                   */
 /* ---------------------------------------------------------------- */