diff --git a/server/runtime_lua_nakama.go b/server/runtime_lua_nakama.go
index e48d82fbfae85423ae2202d5ac2492c27c251770..40c96e01b6b6dc7dc919f464ad6f651780c8b4dc 100644
--- a/server/runtime_lua_nakama.go
+++ b/server/runtime_lua_nakama.go
@@ -143,9 +143,9 @@ func (n *RuntimeLuaNakamaModule) Loader(l *lua.LState) int {
 		"run_once":                           n.runOnce,
 		"get_context":                        n.getContext,
 		"event":                              n.event,
-		"metricsCounterAdd":                  n.metricsCounterAdd,
-		"metricsGaugeSet":                    n.metricsGaugeSet,
-		"metricsTimerRecord":                 n.metricsTimerRecord,
+		"metrics_counter_add":                n.metricsCounterAdd,
+		"metrics_gauge_set":                  n.metricsGaugeSet,
+		"metrics_timer_record":               n.metricsTimerRecord,
 		"localcache_get":                     n.localcacheGet,
 		"localcache_put":                     n.localcachePut,
 		"localcache_delete":                  n.localcacheDelete,