diff --git a/src/msw/taskbar.cpp b/src/msw/taskbar.cpp
index a2d2d8e087..8e98935c90 100644
--- a/src/msw/taskbar.cpp
+++ b/src/msw/taskbar.cpp
@@ -24,6 +24,7 @@
     #include "wx/frame.h"
     #include "wx/utils.h"
     #include "wx/menu.h"
+    #include "wx/app.h"
 #endif
 
 #include "wx/msw/wrapshl.h"