diff --git a/ext/session/mod_files.h b/ext/session/mod_files.h
index c185a03b033..e460ca5014f 100644
--- a/ext/session/mod_files.h
+++ b/ext/session/mod_files.h
@@ -16,6 +16,8 @@
    +----------------------------------------------------------------------+
  */
 
+/* $Id$ */
+
 #ifndef MOD_FILES_H
 #define MOD_FILES_H
 
diff --git a/ext/session/mod_mm.h b/ext/session/mod_mm.h
index 47c46acf1a7..fc221794ded 100644
--- a/ext/session/mod_mm.h
+++ b/ext/session/mod_mm.h
@@ -16,6 +16,8 @@
    +----------------------------------------------------------------------+
  */
 
+/* $Id$ */
+
 #ifndef MOD_MM_H
 #define MOD_MM_H
 
diff --git a/ext/session/mod_user.h b/ext/session/mod_user.h
index 79e28a3941f..cb5d18744ea 100644
--- a/ext/session/mod_user.h
+++ b/ext/session/mod_user.h
@@ -16,6 +16,8 @@
    +----------------------------------------------------------------------+
  */
 
+/* $Id$ */
+
 #ifndef MOD_USER_H
 #define MOD_USER_H
 
diff --git a/ext/session/php_session.h b/ext/session/php_session.h
index 7a3fd5a3491..1be96acba62 100644
--- a/ext/session/php_session.h
+++ b/ext/session/php_session.h
@@ -16,6 +16,8 @@
    +----------------------------------------------------------------------+
  */
 
+/* $Id$ */
+
 #ifndef PHP_SESSION_H
 #define PHP_SESSION_H