diff --git a/lxzap/lxzap.go b/lxzap/lxzap.go
index da9b4e0..6bf3f25 100644
--- a/lxzap/lxzap.go
+++ b/lxzap/lxzap.go
@@ -90,9 +90,8 @@ func GinLogger() gin.HandlerFunc {
 		query := c.Request.URL.RawQuery
 
 		// 1. 先从 header 取
-		spanIDStr := c.GetHeader("TraceId")
-		var spanID string
-		if spanIDStr == "" {
+		spanID := c.GetHeader("TraceId")
+		if spanID == "" {
 			// 2. 没有就生成
 			spanID = cast.ToString(NewUUID())
 		}