diff --git a/include/grpc++/channel_interface.h b/include/grpc++/channel_interface.h
index e86a83bc45b6cbd353ede08309bcffece1131319..bc738fb15a85e63a1735d39768fcfe6978612c09 100644
--- a/include/grpc++/channel_interface.h
+++ b/include/grpc++/channel_interface.h
@@ -50,7 +50,7 @@ class RpcMethod;
 class CallInterface;
 
 class ChannelInterface 
-	: public CallHook, 
+    : public CallHook, 
       public std::enable_shared_from_this<ChannelInterface> {
  public:
   virtual ~ChannelInterface() {}