diff --git a/docs/guide-zh-CN/yii2-redis.md b/docs/guide-zh-CN/yii2-redis.md
index 04a3b0b38b..9f8c0257db 100644
--- a/docs/guide-zh-CN/yii2-redis.md
+++ b/docs/guide-zh-CN/yii2-redis.md
@@ -54,7 +54,7 @@ $redis = Yii::$app->redis;
 
 // 判断 key 为 username 的是否有值，有则打印，没有则赋值
 $key = 'username';
-if ($val = $redis->get($key);) {
+if ($val = $redis->get($key)) {
     var_dump($val);
 } else {
     $redis->set($key, 'marko');