diff --git a/src/debug.h b/src/debug.h
index 95dca72..c614844 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -1,4 +1,4 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -35,6 +35,7 @@
 #include "execution.h"
 #include "factory.h"
 #include "flags.h"
+#include "frames-inl.h"
 #include "hashmap.h"
 #include "platform.h"
 #include "string-stream.h"
@@ -678,13 +679,14 @@
 // Mutex to CommandMessageQueue.  Includes logging of all puts and gets.
 class LockingCommandMessageQueue BASE_EMBEDDED {
  public:
-  explicit LockingCommandMessageQueue(int size);
+  LockingCommandMessageQueue(Logger* logger, int size);
   ~LockingCommandMessageQueue();
   bool IsEmpty() const;
   CommandMessage Get();
   void Put(const CommandMessage& message);
   void Clear();
  private:
+  Logger* logger_;
   CommandMessageQueue queue_;
   Mutex* lock_;
   DISALLOW_COPY_AND_ASSIGN(LockingCommandMessageQueue);
@@ -811,7 +813,7 @@
   bool IsDebuggerActive();
 
  private:
-  Debugger();
+  explicit Debugger(Isolate* isolate);
 
   void CallEventCallback(v8::DebugEvent event,
                          Handle<Object> exec_state,