diff --git a/common/flatpak-dir.c b/common/flatpak-dir.c
index 6fd9dbaf..8f9dc66c 100644
--- a/common/flatpak-dir.c
+++ b/common/flatpak-dir.c
@@ -7374,6 +7374,9 @@ apply_extra_data (FlatpakDir   *self,
 
   runtime = g_key_file_get_string (metakey, group,
                                    FLATPAK_METADATA_KEY_RUNTIME, error);
+  if (runtime == NULL)
+    runtime = g_key_file_get_string (metakey, FLATPAK_METADATA_GROUP_EXTENSION_OF,
+                                     FLATPAK_METADATA_KEY_RUNTIME, NULL);
   if (runtime == NULL)
     return FALSE;