diff --git a/src/sql/engine/ob_sql_mem_mgr_processor.h b/src/sql/engine/ob_sql_mem_mgr_processor.h
index ff6d35ba0a9a009a39714dd55655e4c54d92de59..b1bf21504d0a6d30013ce91562da3cfa998e29fa 100644
--- a/src/sql/engine/ob_sql_mem_mgr_processor.h
+++ b/src/sql/engine/ob_sql_mem_mgr_processor.h
@@ -179,7 +179,7 @@ public:
   }
 
   int alloc_dir_id(int64_t& dir_id);
-  int get_dir_id()
+  int64_t get_dir_id()
   {
     return dir_id_;
   }