diff --git a/utils/dialoged/src/winstyle.cpp b/utils/dialoged/src/winstyle.cpp
index fbff2fd54e..2c789dbc86 100644
--- a/utils/dialoged/src/winstyle.cpp
+++ b/utils/dialoged/src/winstyle.cpp
@@ -23,6 +23,7 @@
 #ifndef WX_PRECOMP
 #include "wx/wx.h"
 #include "wx/listctrl.h"
+#include "wx/treectrl.h"
 #endif
 
 #include <ctype.h>