diff --git a/src/msw/spinbutt.cpp b/src/msw/spinbutt.cpp
index ed7a317458..662a102242 100644
--- a/src/msw/spinbutt.cpp
+++ b/src/msw/spinbutt.cpp
@@ -30,6 +30,7 @@
 #endif
 
 #ifndef WX_PRECOMP
+#include "wx/app.h"
 #endif
 
 #if wxUSE_SPINBTN