diff --git a/include/wx/xrc/xmlres.h b/include/wx/xrc/xmlres.h
index 6146f5956f..9321e4c186 100644
--- a/include/wx/xrc/xmlres.h
+++ b/include/wx/xrc/xmlres.h
@@ -17,6 +17,7 @@
 
 #include "wx/string.h"
 #include "wx/dynarray.h"
+#include "wx/arrstr.h"
 #include "wx/datetime.h"
 #include "wx/list.h"
 #include "wx/gdicmn.h"