diff --git a/gdk/gdkcontentproviderimpl.c b/gdk/gdkcontentproviderimpl.c
index 6685f3f8be..104f3fbf55 100644
--- a/gdk/gdkcontentproviderimpl.c
+++ b/gdk/gdkcontentproviderimpl.c
@@ -302,6 +302,7 @@ gdk_content_provider_union_write_mime_type_async (GdkContentProvider     *provid
                                                       gdk_content_provider_union_write_mime_type_done,
                                                       task);
           gdk_content_formats_unref (formats);
+          return;
         }
       gdk_content_formats_unref (formats);
     }