diff --git a/src/generic/numdlgg.cpp b/src/generic/numdlgg.cpp
index 17c15f8788..0c0262384a 100644
--- a/src/generic/numdlgg.cpp
+++ b/src/generic/numdlgg.cpp
@@ -35,6 +35,7 @@
     #include "wx/textctrl.h"
     #include "wx/intl.h"
     #include "wx/sizer.h"
+    #include "wx/wxcrtvararg.h"
 #endif
 
 #if wxUSE_STATLINE