diff --git a/common/rpc-service.c b/common/rpc-service.c
index bc9c311..bf61640 100644
--- a/common/rpc-service.c
+++ b/common/rpc-service.c
@@ -4645,11 +4645,21 @@ seafile_list_dir_with_perm (const char *repo_id,
         return NULL;
     }
 
+    if (!path) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS, "Invalid path");
+        return NULL;
+    }
+
     if (!dir_id || !is_object_id_valid (dir_id)) {
         g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS, "Invalid dir id");
         return NULL;
     }
 
+    if (!user) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS, "Invalid user");
+        return NULL;
+    }
+
     char *rpath = format_dir_path (path);
 
     GList *ret = seaf_repo_manager_list_dir_with_perm (seaf->repo_mgr,
diff --git a/server/repo-perm.c b/server/repo-perm.c
index 72c10b2..83d73ee 100644
--- a/server/repo-perm.c
+++ b/server/repo-perm.c
@@ -215,11 +215,6 @@ seaf_repo_manager_list_dir_with_perm (SeafRepoManager *mgr,
     GList *res = NULL;
     GList *p;
 
-    if (!repo_id || !is_uuid_valid(repo_id) || dir_id == NULL || !user) {
-        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_DIR_ID, "Bad dir id");
-        return NULL;
-    }
-
     perm = seaf_repo_manager_check_permission (mgr, repo_id, user, error);
     if (!perm) {
         if (*error == NULL)