diff --git a/include/wx/msw/missing.h b/include/wx/msw/missing.h
index 305910fa64..66acdfc7e2 100644
--- a/include/wx/msw/missing.h
+++ b/include/wx/msw/missing.h
@@ -180,5 +180,15 @@ struct HH_AKLINK
     BOOL      fIndexOnFail;
 };
 
+
+// ----------------------------------------------------------------------------
+// Misc stuff
+// ----------------------------------------------------------------------------
+
+#ifndef QS_ALLPOSTMESSAGE
+    #define QS_ALLPOSTMESSAGE    0x0100
+#endif
+
+
 #endif
     // _WX_MISSING_H_
diff --git a/src/msw/thread.cpp b/src/msw/thread.cpp
index 27ab616999..d93d017704 100644
--- a/src/msw/thread.cpp
+++ b/src/msw/thread.cpp
@@ -32,6 +32,7 @@
 #if wxUSE_THREADS
 
 #include "wx/msw/private.h"
+#include "wx/msw/missing.h"
 
 #include "wx/module.h"
 #include "wx/thread.h"
@@ -79,11 +80,6 @@
     #define THREAD_CALLCONV WINAPI
 #endif
 
-// the old mingw32 headers don't have this one
-#ifndef QS_ALLPOSTMESSAGE
-    #define QS_ALLPOSTMESSAGE 0x0100
-#endif
-
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------