diff --git a/crypto/bio/b_addr.c b/crypto/bio/b_addr.c
index 8f94fe8ffb..61714e5602 100644
--- a/crypto/bio/b_addr.c
+++ b/crypto/bio/b_addr.c
@@ -715,8 +715,12 @@ int BIO_lookup(const char *host, const char *service,
             he = gethostbyname(host);
 
             if (he == NULL) {
+#ifndef OPENSSL_SYS_WINDOWS
                 BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB);
                 ERR_add_error_data(1, hstrerror(h_errno));
+#else
+                SYSerr(SYS_F_GETHOSTBYNAME, WSAGetLastError());
+#endif
                 ret = 0;
                 goto err;
             }
@@ -747,8 +751,12 @@ int BIO_lookup(const char *host, const char *service,
                 se = getservbyname(service, proto);
 
                 if (se == NULL) {
+#ifndef OPENSSL_SYS_WINDOWS
                     BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB);
                     ERR_add_error_data(1, hstrerror(h_errno));
+#else
+                    SYSerr(SYS_F_GETSERVBYNAME, WSAGetLastError());
+#endif
                     goto err;
                 }
             } else {
diff --git a/crypto/err/err.c b/crypto/err/err.c
index 6cb582debe..64f8adc46d 100644
--- a/crypto/err/err.c
+++ b/crypto/err/err.c
@@ -178,6 +178,7 @@ static ERR_STRING_DATA ERR_str_functs[] = {
     {ERR_PACK(0, SYS_F_SETSOCKOPT, 0), "setsockopt"},
     {ERR_PACK(0, SYS_F_GETSOCKOPT, 0), "getsockopt"},
     {ERR_PACK(0, SYS_F_GETSOCKNAME, 0), "getsockname"},
+    {ERR_PACK(0, SYS_F_GETHOSTBYNAME, 0), "gethostbyname"},
     {0, NULL},
 };
 
diff --git a/include/openssl/err.h b/include/openssl/err.h
index 370763c35f..8baf6b7a13 100644
--- a/include/openssl/err.h
+++ b/include/openssl/err.h
@@ -262,6 +262,7 @@ typedef struct err_state_st {
 # define SYS_F_SETSOCKOPT        14
 # define SYS_F_GETSOCKOPT        15
 # define SYS_F_GETSOCKNAME       16
+# define SYS_F_GETHOSTBYNAME     17
 
 /* reasons */
 # define ERR_R_SYS_LIB   ERR_LIB_SYS/* 2 */