diff --git a/src/js/dyna-rules.js b/src/js/dyna-rules.js
index 65f5dac56..74d1be8a5 100644
--- a/src/js/dyna-rules.js
+++ b/src/js/dyna-rules.js
@@ -189,8 +189,12 @@ var commitHandler = function() {
 /******************************************************************************/
 
 var editStartHandler = function() {
-    uDom('#diff .right textarea').val(rulesFromHTML('#diff .right li'));
     var parent = uDom(this).ancestors('#diff');
+    // If we're already editing, don't reset
+    if ( parent.hasClassName('edit') ) {
+        return;
+    }
+    uDom('#diff .right textarea').val(rulesFromHTML('#diff .right li'));
     parent.toggleClass('edit', true);
 };