diff --git a/editor_plugin.js b/editor_plugin.js
index 409b73c06400930db9df17d140daa11d6130b2c6..d0855df8bde3ff1d12d597168ea6813361a53a6c 100644
--- a/editor_plugin.js
+++ b/editor_plugin.js
@@ -47,6 +47,9 @@
 			    for (var i = 0; i < links.length; i++) {
 			        var link = links[i];
 			        var href = link.getAttribute('href');
+			        if (!href) {
+			            continue;
+			        }
 			        
 			        // add icons to links via UNL template
 			        if (href.search(/^mailto:/) >= 0 ) {