diff --git a/transport/src/main/java/io/netty/channel/AbstractChannel.java b/transport/src/main/java/io/netty/channel/AbstractChannel.java
index 251b93278d..c0dbd41e18 100644
--- a/transport/src/main/java/io/netty/channel/AbstractChannel.java
+++ b/transport/src/main/java/io/netty/channel/AbstractChannel.java
@@ -880,7 +880,6 @@ public abstract class AbstractChannel extends DefaultAttributeMap implements Cha
             return unsafeVoidPromise;
         }
 
-        @Deprecated
         protected final boolean ensureOpen(ChannelPromise promise) {
             if (isOpen()) {
                 return true;