diff --git a/include/wx/wxprec.h b/include/wx/wxprec.h
index 940c4a6521..6f542b6a45 100644
--- a/include/wx/wxprec.h
+++ b/include/wx/wxprec.h
@@ -31,7 +31,7 @@
 // Comment this out if you don't mind slower compilation of the wxWindows
 // library
 #if !defined(__WXMAC__) && !defined(__SALFORDC__)
-// #include <windows.h>
+#include <windows.h>
 #endif
 
 #ifdef GetClassInfo