diff --git a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/Protocol.java b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/Protocol.java
index 771e58a..9854c50 100644
--- a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/Protocol.java
+++ b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/Protocol.java
@@ -7,6 +7,7 @@ import com.acgist.taoyao.signal.event.ApplicationEventAdapter;
 
 /**
  * 信令
+ * 注意：如果信令要被Controller调用建议提供接口防止注解失效
  * 
  * room::     房间信令
  * media::    媒体信令