diff --git a/lib/config-win32.h b/lib/config-win32.h
index bd66b56c9dca1150db0741a01ffc066dbe4ae789..0bc736431fcc72ab3c9fb90027fd500cbb63ae79 100644
--- a/lib/config-win32.h
+++ b/lib/config-win32.h
@@ -291,7 +291,7 @@
 #endif
 
 /* Define to 'int' if socklen_t is not an available 'typedefed' type */
-#ifndef HAVE_WS2TCPIP_H
+#if defined(_MSC_VER) && (_MSC_VER <= 1400)
 #define socklen_t int
 #endif