diff --git a/include/wx/choicdlg.h b/include/wx/choicdlg.h
index 863b880aff..0ab4c076d6 100644
--- a/include/wx/choicdlg.h
+++ b/include/wx/choicdlg.h
@@ -11,11 +11,12 @@
 #ifndef _WX_CHOICDLG_H_BASE_
 #define _WX_CHOICDLG_H_BASE_
 
+#include "wx/defs.h"
+
 #if wxUSE_CHOICEDLG
 
 #include "wx/generic/choicdgg.h"
 
 #endif
 
-#endif
-    // _WX_CHOICDLG_H_BASE_
+#endif // _WX_CHOICDLG_H_BASE_