diff --git a/Source/Preprocessor/cpp.c b/Source/Preprocessor/cpp.c
index 78f7c4fb5..fa9f6515f 100644
--- a/Source/Preprocessor/cpp.c
+++ b/Source/Preprocessor/cpp.c
@@ -13,7 +13,7 @@
  * - Lines beginning with %# are stripped down to #... and passed through.
  * ----------------------------------------------------------------------------- */
 
-char cvsroot_cpp_c[] = "$Header$";
+char cvsroot_cpp_c[] = "$Id$";
 
 #include "swig.h"
 #include "preprocessor.h"
diff --git a/Source/Preprocessor/expr.c b/Source/Preprocessor/expr.c
index 499a100bf..3b1d794f4 100644
--- a/Source/Preprocessor/expr.c
+++ b/Source/Preprocessor/expr.c
@@ -8,7 +8,7 @@
  * encountered during preprocessing.
  * ----------------------------------------------------------------------------- */
 
-char cvsroot_expr_c[] = "$Header$";
+char cvsroot_expr_c[] = "$Id$";
 
 #include "swig.h"
 #include "preprocessor.h"
diff --git a/Source/Preprocessor/preprocessor.h b/Source/Preprocessor/preprocessor.h
index e6c3be05f..4f7ff8804 100644
--- a/Source/Preprocessor/preprocessor.h
+++ b/Source/Preprocessor/preprocessor.h
@@ -7,7 +7,7 @@
  * SWIG preprocessor module.
  * ----------------------------------------------------------------------------- */
 
-/* $Header$ */
+/* $Id$ */
 
 #ifndef SWIG_PREPROCESSOR_H_
 #define SWIG_PREPROCESSOR_H_