diff --git a/transport-sctp/src/main/java/io/netty/channel/sctp/SctpServerChannelImpl.java b/transport-sctp/src/main/java/io/netty/channel/sctp/SctpServerChannelImpl.java
index da3671c3f5..5b54e77922 100644
--- a/transport-sctp/src/main/java/io/netty/channel/sctp/SctpServerChannelImpl.java
+++ b/transport-sctp/src/main/java/io/netty/channel/sctp/SctpServerChannelImpl.java
@@ -21,7 +21,6 @@ import java.io.IOException;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
-import java.nio.channels.Selector;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.Iterator;
@@ -49,7 +48,6 @@ class SctpServerChannelImpl extends AbstractServerChannel
 
     final com.sun.nio.sctp.SctpServerChannel serverChannel;
     final Lock shutdownLock = new ReentrantLock();
-    volatile Selector selector;
     private final SctpServerChannelConfig config;
 
     private volatile boolean bound;
diff --git a/transport-sctp/src/main/java/io/netty/channel/sctp/SctpWorker.java b/transport-sctp/src/main/java/io/netty/channel/sctp/SctpWorker.java
index 83fb429529..c2454e9a3f 100644
--- a/transport-sctp/src/main/java/io/netty/channel/sctp/SctpWorker.java
+++ b/transport-sctp/src/main/java/io/netty/channel/sctp/SctpWorker.java
@@ -45,7 +45,6 @@ import java.nio.channels.CancelledKeyException;
 import java.nio.channels.ClosedChannelException;
 import java.nio.channels.ClosedSelectorException;
 import java.nio.channels.SelectionKey;
-import java.nio.channels.Selector;
 import java.util.Queue;
 import java.util.Set;
 import java.util.concurrent.Executor;
@@ -430,7 +429,6 @@ public class SctpWorker extends NioWorker {
         try {
             if (channel.serverChannel.isOpen()) {
                 channel.serverChannel.close();
-                Selector selector = channel.selector;
                 if (selector != null) {
                     selector.wakeup();
                 }
diff --git a/transport/src/main/java/io/netty/channel/socket/nio/AbstractNioWorker.java b/transport/src/main/java/io/netty/channel/socket/nio/AbstractNioWorker.java
index 481f8823a1..fab9c72212 100644
--- a/transport/src/main/java/io/netty/channel/socket/nio/AbstractNioWorker.java
+++ b/transport/src/main/java/io/netty/channel/socket/nio/AbstractNioWorker.java
@@ -800,7 +800,6 @@ abstract class AbstractNioWorker implements Worker {
         try {
             if (channel.socket.isOpen()) {
                 channel.socket.close();
-                Selector selector = channel.selector;
                 if (selector != null) {
                     selector.wakeup();
                 }
diff --git a/transport/src/main/java/io/netty/channel/socket/nio/NioServerSocketChannel.java b/transport/src/main/java/io/netty/channel/socket/nio/NioServerSocketChannel.java
index 9ede4ef802..608537e90a 100644
--- a/transport/src/main/java/io/netty/channel/socket/nio/NioServerSocketChannel.java
+++ b/transport/src/main/java/io/netty/channel/socket/nio/NioServerSocketChannel.java
@@ -19,7 +19,6 @@ import static io.netty.channel.Channels.*;
 
 import java.io.IOException;
 import java.net.InetSocketAddress;
-import java.nio.channels.Selector;
 import java.nio.channels.ServerSocketChannel;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
@@ -42,7 +41,6 @@ final class NioServerSocketChannel extends AbstractServerChannel
 
     final ServerSocketChannel socket;
     final Lock shutdownLock = new ReentrantLock();
-    volatile Selector selector;
     final NioWorker worker;
     
     
diff --git a/transport/src/main/java/io/netty/channel/socket/nio/SendBufferPool.java b/transport/src/main/java/io/netty/channel/socket/nio/SendBufferPool.java
index c25db6aa1d..5a40272792 100644
--- a/transport/src/main/java/io/netty/channel/socket/nio/SendBufferPool.java
+++ b/transport/src/main/java/io/netty/channel/socket/nio/SendBufferPool.java
@@ -261,7 +261,7 @@ public class SendBufferPool {
         }
     }
 
-    final class FileSendBuffer implements SendBuffer {
+    static final class FileSendBuffer implements SendBuffer {
 
         private final FileRegion file;
         private long writtenBytes;