diff --git a/include/wx/module.h b/include/wx/module.h
index bff799aaa9..c620974f52 100644
--- a/include/wx/module.h
+++ b/include/wx/module.h
@@ -14,6 +14,7 @@
 
 #include "wx/object.h"
 #include "wx/list.h"
+#include "wx/arrstr.h"
 #include "wx/dynarray.h"
 
 // declare a linked list of modules