diff --git a/transport/src/main/java/io/netty/channel/ChannelOutboundHandler.java b/transport/src/main/java/io/netty/channel/ChannelOutboundHandler.java
index 92a3943ad0..0795198195 100644
--- a/transport/src/main/java/io/netty/channel/ChannelOutboundHandler.java
+++ b/transport/src/main/java/io/netty/channel/ChannelOutboundHandler.java
@@ -69,6 +69,7 @@ public interface ChannelOutboundHandler extends ChannelHandler {
      * @param promise           the {@link ChannelPromise} to notify once the operation completes
      * @throws Exception        thrown if an error accour
      */
+    @Deprecated
     void deregister(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception;
 
     /**