diff --git a/server.go b/server.go
index 49c06c6d98..8cd6fef5f8 100644
--- a/server.go
+++ b/server.go
@@ -2973,7 +2973,7 @@ const (
 	StateClosed
 )
 
-var stateName = map[ConnState]string{
+var stateName = []string{
 	StateNew:      "new",
 	StateActive:   "active",
 	StateIdle:     "idle",