diff --git a/server/http-server.c b/server/http-server.c
index daa57ae..46f7052 100644
--- a/server/http-server.c
+++ b/server/http-server.c
@@ -2251,10 +2251,12 @@ get_accessible_repo_list_cb (evhtp_request_t *req, void *arg)
     //get group repo list
     GHashTable *group_repos = NULL;
     repos = seaf_get_group_repos_by_user (seaf->repo_mgr, user, org_id, &error);
-    group_repos = filter_group_repos (repos);
-    group_repos_to_json (repo_array, group_repos, obtained_repos);
-    g_hash_table_destroy (group_repos);
-    g_list_free (repos);
+    if (repos) {
+        group_repos = filter_group_repos (repos);
+        group_repos_to_json (repo_array, group_repos, obtained_repos);
+        g_hash_table_destroy (group_repos);
+        g_list_free (repos);
+    }
 
     //get inner public repo list
     repos = seaf_repo_manager_list_inner_pub_repos (seaf->repo_mgr);