diff --git a/include/wx/osx/dataobj.h b/include/wx/osx/dataobj.h
index 375d7d4079..45a73f289f 100644
--- a/include/wx/osx/dataobj.h
+++ b/include/wx/osx/dataobj.h
@@ -24,7 +24,7 @@ public:
 #endif
 
     virtual bool IsSupportedFormat( const wxDataFormat& format, Direction dir = Get ) const;
-    void AddToPasteboard( void * pasteboardRef , int itemID );
+    void AddToPasteboard( void * pasteboardRef , wxIntPtr itemID );
     // returns true if the passed in format is present in the pasteboard
     static bool IsFormatInPasteboard( void * pasteboardRef, const wxDataFormat &dataFormat );
     // returns true if any of the accepted formats of this dataobj is in the pasteboard
diff --git a/src/osx/carbon/dataobj.cpp b/src/osx/carbon/dataobj.cpp
index 645733f8f4..2b625d0e06 100644
--- a/src/osx/carbon/dataobj.cpp
+++ b/src/osx/carbon/dataobj.cpp
@@ -259,7 +259,7 @@ bool wxDataObject::IsSupportedFormat( const wxDataFormat& rFormat, Direction vDi
     return found;
 }
 
-void wxDataObject::AddToPasteboard( void * pb, int itemID )
+void wxDataObject::AddToPasteboard( void * pb, wxIntPtr itemID )
 {
     PasteboardRef pasteboard = (PasteboardRef) pb;
    // get formats from wxDataObjects
@@ -301,7 +301,7 @@ void wxDataObject::AddToPasteboard( void * pb, int itemID )
             memset( buf, 0, sz );
             if ( GetDataHere( thisFormat, buf ) )
             {
-                int counter = 1 ;
+                wxIntPtr counter = 1 ;
                 if ( thisFormat.GetType() == wxDF_FILENAME )
                 {
                     // the data is D-normalized UTF8 strings of filenames delimited with \n
diff --git a/src/osx/core/hid.cpp b/src/osx/core/hid.cpp
index 10faa7d10e..92c874aa26 100644
--- a/src/osx/core/hid.cpp
+++ b/src/osx/core/hid.cpp
@@ -378,7 +378,7 @@ bool wxHIDDevice::IsActive(int nIndex)
 // ----------------------------------------------------------------------------
 bool wxHIDDevice::HasElement(int nIndex)
 {
-    return (void*) m_pCookies[nIndex] != NULL;
+    return m_pCookies[nIndex] != 0;
 }
 
 // ----------------------------------------------------------------------------