diff --git a/transport/src/main/java/io/netty/channel/nio/AbstractNioChannel.java b/transport/src/main/java/io/netty/channel/nio/AbstractNioChannel.java
index c71467ce9e..516a94f665 100644
--- a/transport/src/main/java/io/netty/channel/nio/AbstractNioChannel.java
+++ b/transport/src/main/java/io/netty/channel/nio/AbstractNioChannel.java
@@ -46,7 +46,7 @@ public abstract class AbstractNioChannel extends AbstractChannel {
 
     private final SelectableChannel ch;
     protected final int readInterestOp;
-    private volatile SelectionKey selectionKey;
+    volatile SelectionKey selectionKey;
     private volatile boolean inputShutdown;
     private volatile boolean readPending;
 
diff --git a/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java b/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java
index ab853e9521..bd7673a953 100644
--- a/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java
+++ b/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java
@@ -259,7 +259,11 @@ public final class NioEventLoop extends SingleThreadEventLoop {
 
                         int interestOps = key.interestOps();
                         key.cancel();
-                        key.channel().register(newSelector, interestOps, a);
+                        SelectionKey newKey = key.channel().register(newSelector, interestOps, a);
+                        if (a instanceof AbstractNioChannel) {
+                            // Update SelectionKey
+                            ((AbstractNioChannel) a).selectionKey = newKey;
+                        }
                         nChannels ++;
                     } catch (Exception e) {
                         logger.warn("Failed to re-register a Channel to the new Selector.", e);