diff --git a/lib/pagelib.php b/lib/pagelib.php
index 189f0c723d0..73831ac2e74 100644
--- a/lib/pagelib.php
+++ b/lib/pagelib.php
@@ -1932,6 +1932,7 @@ class moodle_page {
 
         if (!empty($this->_cm)) {
             $this->add_body_class('cmid-' . $this->_cm->id);
+            $this->add_body_class('cm-type-' . $this->_cm->modname);
         }
 
         if (!empty($CFG->allowcategorythemes)) {
diff --git a/theme/upgrade.txt b/theme/upgrade.txt
index d4e6038ff70..36c73dbbf03 100644
--- a/theme/upgrade.txt
+++ b/theme/upgrade.txt
@@ -5,6 +5,7 @@ information provided here is intended especially for theme designer.
 * A new theme config 'removedprimarynavitems' allows a theme to customise primary navigation by specifying the list of items to remove.
 * A new theme config 'usescourseindex' allows a theme to specify whether it implements and uses course index.
 * A new theme setting 'unaddableblocks' allows admins to define the blocks that won't be displayed in the "Add a block" list.
+* The body tag include a class with module name specific for each activity E.g.: cm-type-page
 
 === 3.11 ===
 * The classname 'viewmode-cobmined' in course/management.php has been changed to 'viewmode-combined'