diff --git a/include/wx/cocoa/NSSlider.h b/include/wx/cocoa/NSSlider.h
index c4ddfecc36..3543f3b8d8 100644
--- a/include/wx/cocoa/NSSlider.h
+++ b/include/wx/cocoa/NSSlider.h
@@ -4,7 +4,7 @@
 // Author:      Mark Oxenham
 // Modified by:
 // Created:     2007/08/10
-// RCS-ID:      $Id: $
+// RCS-ID:      $Id$
 // Copyright:   (c) 2007 Software 2000 Ltd. All rights reserved.
 // Licence:     wxWidgets licence
 /////////////////////////////////////////////////////////////////////////////
diff --git a/src/cocoa/NSSlider.mm b/src/cocoa/NSSlider.mm
index b281f9bfac..8ab3be3c1c 100644
--- a/src/cocoa/NSSlider.mm
+++ b/src/cocoa/NSSlider.mm
@@ -4,7 +4,7 @@
 // Author:      Mark Oxenham
 // Modified by:
 // Created:     2007/08/10
-// RCS-ID:      $Id: $
+// RCS-ID:      $Id$
 // Copyright:   (c) 2007 Software 2000 Ltd. All rights reserved.
 // Licence:     wxWidgets licence
 /////////////////////////////////////////////////////////////////////////////