diff --git a/common/flatpak-dir.c b/common/flatpak-dir.c
index c28e5098..054db04b 100644
--- a/common/flatpak-dir.c
+++ b/common/flatpak-dir.c
@@ -4942,7 +4942,7 @@ flatpak_dir_setup_extra_data (FlatpakDir                           *self,
   g_assert (results == NULL || rev != NULL);
 
   /* ostree-metadata and appstreams never have extra data, so ignore those */
-  if (g_str_has_prefix ("app/", ref) || g_str_has_prefix ("runtime/", ref))
+  if (g_str_has_prefix (ref, "app/") || g_str_has_prefix (ref, "runtime/"))
     {
       extra_data_sources = flatpak_repo_get_extra_data_sources (repo, rev, cancellable, NULL);
       if (extra_data_sources == NULL)