diff --git a/relayloginfo.h b/relayloginfo.h
index b097f35..1e60d33 100644
--- a/relayloginfo.h
+++ b/relayloginfo.h
@@ -50,7 +50,7 @@ class RelayLogInfo {
         m_map_table_name[table_id] = {db_name, table_name};
     }
 
-    TableKey getTableNameById(int table_id) const
+    TableKey getTableNameById(unsigned long table_id) const
     {
         id_to_name_t::const_iterator p = m_map_table_name.find(table_id);