diff --git a/pykd/dbgengine.h b/pykd/dbgengine.h
index 950c2b3..34e7bb3 100644
--- a/pykd/dbgengine.h
+++ b/pykd/dbgengine.h
@@ -63,8 +63,6 @@ void getStackTrace(std::vector<STACK_FRAME_DESC> &frames);
 
 // callback events
 
-#define DEBUG_CALLBACK_METHODTYPE __cdecl
-
 enum DEBUG_CALLBACK_RESULT {
     DebugCallbackProceed = 0,
     DebugCallbackNoChange = 1,
@@ -75,7 +73,7 @@ enum DEBUG_CALLBACK_RESULT {
 
 struct DEBUG_EVENT_CALLBACK {
 
-    virtual DEBUG_CALLBACK_RESULT DEBUG_CALLBACK_METHODTYPE OnBreakpoint( ULONG bpId ) = 0;
+    virtual DEBUG_CALLBACK_RESULT OnBreakpoint( ULONG bpId ) = 0;
 };
 
 void eventRegisterCallbacks( const DEBUG_EVENT_CALLBACK *callbacks );
diff --git a/pykd/eventhandler.cpp b/pykd/eventhandler.cpp
index 05db8b8..cef87ac 100644
--- a/pykd/eventhandler.cpp
+++ b/pykd/eventhandler.cpp
@@ -23,7 +23,7 @@ EventHandler::~EventHandler()
 
 ///////////////////////////////////////////////////////////////////////////////
 
-DEBUG_CALLBACK_RESULT DEBUG_CALLBACK_METHODTYPE EventHandlerImpl::OnBreakpoint( ULONG bpId )
+DEBUG_CALLBACK_RESULT EventHandlerImpl::OnBreakpoint( ULONG bpId )
 {
     BpMap::iterator  foundIt = m_bpMap.find( bpId );
     if ( foundIt == m_bpMap.end() )
diff --git a/pykd/eventhandler.h b/pykd/eventhandler.h
index 0fc9519..2343a3f 100644
--- a/pykd/eventhandler.h
+++ b/pykd/eventhandler.h
@@ -21,7 +21,7 @@ public:
 
 private:
 
-    virtual DEBUG_CALLBACK_RESULT DEBUG_CALLBACK_METHODTYPE OnBreakpoint( ULONG bpId ) = 0;
+    virtual DEBUG_CALLBACK_RESULT OnBreakpoint( ULONG bpId ) = 0;
 };
 
 //////////////////////////////////////////////////////////////////////////////////
@@ -32,7 +32,7 @@ class EventHandlerWrap : public python::wrapper<EventHandler>, public EventHandl
 
 public:
 
-    virtual DEBUG_CALLBACK_RESULT DEBUG_CALLBACK_METHODTYPE OnBreakpoint( ULONG Id ) {
+    virtual DEBUG_CALLBACK_RESULT OnBreakpoint( ULONG Id ) {
         return handler("onBreakpoint", Id);
     }
 
@@ -100,7 +100,7 @@ public:
 
 private:
 
-    virtual DEBUG_CALLBACK_RESULT DEBUG_CALLBACK_METHODTYPE OnBreakpoint( ULONG bpId );
+    virtual DEBUG_CALLBACK_RESULT OnBreakpoint( ULONG bpId );
 
 private: