diff --git a/handler/src/main/java/io/netty/handler/execution/ExecutionHandler.java b/handler/src/main/java/io/netty/handler/execution/ExecutionHandler.java
index 8ccc3278e9..391a59b797 100644
--- a/handler/src/main/java/io/netty/handler/execution/ExecutionHandler.java
+++ b/handler/src/main/java/io/netty/handler/execution/ExecutionHandler.java
@@ -110,7 +110,7 @@ public class ExecutionHandler implements ChannelUpstreamHandler, ChannelDownstre
 
     private final Executor executor;
     private final boolean handleDownstream;
-	private final boolean handleUpstream;
+    private final boolean handleUpstream;
 
     /**
      * Creates a new instance with the specified {@link Executor} which only handles upstream events.