diff --git a/main/webapp/modules/core/scripts/dialogs/clustering-dialog.js b/main/webapp/modules/core/scripts/dialogs/clustering-dialog.js
index dcb806094..4b3951f81 100644
--- a/main/webapp/modules/core/scripts/dialogs/clustering-dialog.js
+++ b/main/webapp/modules/core/scripts/dialogs/clustering-dialog.js
@@ -176,8 +176,7 @@ ClusteringDialog.prototype._renderTable = function(clusters) {
               
               parent.find("input[type='text']").val(value);
               var checkbox = parent.find("input[type='checkbox']");
-              if (!checkbox.attr('checked'))
-            		  checkbox.attr('checked', true).change();
+              checkbox.prop('checked', true).change();
               return false;
             };
             for (var c = 0; c < choices.length; c++) {
@@ -219,7 +218,7 @@ ClusteringDialog.prototype._renderTable = function(clusters) {
             
             var editCheck = $('<input type="checkbox" />')
                 .change(function() {
-                    cluster.edit = !cluster.edit;
+                    cluster.edit = this.checked;
                 }).appendTo(tr.insertCell(3));
 
             if (cluster.edit) {