diff --git a/src/config/afsconfig-windows.h b/src/config/afsconfig-windows.h
index 1049f8df6e..86ddeda6de 100644
--- a/src/config/afsconfig-windows.h
+++ b/src/config/afsconfig-windows.h
@@ -200,7 +200,8 @@
 #endif
 
 /* Windows does not provide socklen_t prior to WDK 6.0 */
-#undef HAVE_SOCKLEN_T
+#define HAVE_SOCKLEN_T 1
+typedef int socklen_t;
 
 #if (_MSC_VER < 1400)
 typedef int errno_t;