diff --git a/lib/yui/formchangechecker/formchangechecker.js b/lib/yui/formchangechecker/formchangechecker.js
index dc819aaaf71..a4fa15b9569 100644
--- a/lib/yui/formchangechecker/formchangechecker.js
+++ b/lib/yui/formchangechecker/formchangechecker.js
@@ -88,7 +88,11 @@ YUI.add('moodle-core-formchangechecker',
         /**
          * Set the form changed state to true
          */
-        M.core_formchangechecker.set_form_changed = function() {
+        M.core_formchangechecker.set_form_changed = function(e) {
+            if (e.target.hasClass('ignoredirty')) {
+                // Don't warn on elements with the ignoredirty class
+                return;
+            }
             M.core_formchangechecker.stateinformation.formchanged = 1;
 
             // Once the form has been marked as dirty, we no longer need to keep track of form elements