diff --git a/nsock/src/nsock_internal.h b/nsock/src/nsock_internal.h
index 24aa22dcb..0a13fa5e2 100644
--- a/nsock/src/nsock_internal.h
+++ b/nsock/src/nsock_internal.h
@@ -68,6 +68,7 @@
 
 #ifdef WIN32
 #include "nbase_winconfig.h"
+#include "nbase_winunix.h"
 #include <Winsock2.h>
 #endif