diff --git a/src/msw/imaglist.cpp b/src/msw/imaglist.cpp
index 83fb524583..24f64bc4bc 100644
--- a/src/msw/imaglist.cpp
+++ b/src/msw/imaglist.cpp
@@ -24,6 +24,7 @@
 #endif
 
 #ifndef WX_PRECOMP
+    #include "wx/app.h"
     #include "wx/msw/wrapcctl.h" // include <commctrl.h> "properly"
     #include "wx/window.h"
     #include "wx/icon.h"