diff --git a/dir.c b/dir.c
index d54d0436..8b03b837 100644
--- a/dir.c
+++ b/dir.c
@@ -526,7 +526,7 @@ open_dirstream (directory)
   new->bucket = 0;
   new->elt = new->contents->files[0];
 
-  return new;
+  return (__ptr_t) new;
 }
 
 static const char *