diff --git a/src/msw/app.cpp b/src/msw/app.cpp
index 6f3427a7bc..591578c2b8 100644
--- a/src/msw/app.cpp
+++ b/src/msw/app.cpp
@@ -34,6 +34,7 @@
   #include "wx/dialog.h"
   #include "wx/msgdlg.h"
   #include "wx/intl.h"
+  #include "wx/dynarray.h"
 #endif
 
 #include "wx/msw/private.h"