diff --git a/Source/Core/DolphinWX/NetPlay/NetWindow.h b/Source/Core/DolphinWX/NetPlay/NetWindow.h
index 3c5c6b27c0..32c3075fe7 100644
--- a/Source/Core/DolphinWX/NetPlay/NetWindow.h
+++ b/Source/Core/DolphinWX/NetPlay/NetWindow.h
@@ -14,6 +14,15 @@
 #include "Core/NetPlayProto.h"
 #include "Core/NetPlayServer.h"
 
+// HACK: wxWidgets headers don't play well with some of the macros defined in Windows
+// headers and perform their own magic to fix things, as long as they're included entirely
+// either before or after any Windows headers.
+//
+// This file can cause a conflict in other DolphinWX files because NetPlay headers directly
+// include ENet headers, which leak Windows header macros. To fix this, explicitly tell
+// wxWidgets here that it needs to re-clean macros.
+#include <wx/msw/winundef.h>
+
 class CGameListCtrl;
 class MD5Dialog;
 class wxButton;