diff --git a/src/editor.html b/src/editor.html
index 971b638..e84b00f 100644
--- a/src/editor.html
+++ b/src/editor.html
@@ -1525,7 +1525,7 @@
 				// Get the contents
 				var h = document.getElementById(editorId).innerHTML;
 
-				return h.replaceAll('wvb', 'REPLACE');;
+				return h ? h.replace(/wvb/g, 'REPLACE') : '';
 			}
 
 			zss_editor.getTitleHTML = function() {