diff --git a/mod/resource/type/directory/resource.class.php b/mod/resource/type/directory/resource.class.php
index ae8526cd014..a04035976fc 100644
--- a/mod/resource/type/directory/resource.class.php
+++ b/mod/resource/type/directory/resource.class.php
@@ -1,4 +1,4 @@
-<?php
+<?php // %Id%
 
 class resource extends resource_base {
 
diff --git a/mod/resource/type/file/resource.class.php b/mod/resource/type/file/resource.class.php
index 2b04df71a3a..c6f8aa05b64 100644
--- a/mod/resource/type/file/resource.class.php
+++ b/mod/resource/type/file/resource.class.php
@@ -1,4 +1,4 @@
-<?php
+<?php // %Id%
 
 /**
 * Extend the base resource class for file resources
diff --git a/mod/resource/type/html/resource.class.php b/mod/resource/type/html/resource.class.php
index 59088d193be..3acca485ddd 100644
--- a/mod/resource/type/html/resource.class.php
+++ b/mod/resource/type/html/resource.class.php
@@ -1,4 +1,4 @@
-<?php
+<?php // %Id%
 
 class resource extends resource_base {
 
diff --git a/mod/resource/type/reference/resource.class.php b/mod/resource/type/reference/resource.class.php
index ea9d8ec1f65..cf41a828f6e 100644
--- a/mod/resource/type/reference/resource.class.php
+++ b/mod/resource/type/reference/resource.class.php
@@ -1,4 +1,4 @@
-<?php
+<?php // %Id%
 
 class resource extends resource_base {
 
diff --git a/mod/resource/type/text/resource.class.php b/mod/resource/type/text/resource.class.php
index 059f85d8c27..08920a02509 100644
--- a/mod/resource/type/text/resource.class.php
+++ b/mod/resource/type/text/resource.class.php
@@ -1,4 +1,4 @@
-<?php
+<?php // %Id%
 
 class resource extends resource_base {