diff --git a/include/wx/gsocket.h b/include/wx/gsocket.h
index 6070b76de8..4158ab1baa 100644
--- a/include/wx/gsocket.h
+++ b/include/wx/gsocket.h
@@ -13,6 +13,7 @@
 
 #ifndef __GSOCKET_STANDALONE__
 #include "wx/setup.h"
+#include "wx/platform.h"
 
 #include "wx/dlimpexp.h" // for WXDLLIMPEXP_NET