diff --git a/lib/ace/autocomplete/popup.js b/lib/ace/autocomplete/popup.js
index 2475d6a5..3a2b9de7 100644
--- a/lib/ace/autocomplete/popup.js
+++ b/lib/ace/autocomplete/popup.js
@@ -192,10 +192,12 @@ var AcePopup = function(parentNode) {
         return selectionMarker.start.row;
     };
     popup.setRow = function(line) {
-        popup.selection.clearSelection();
-        selectionMarker.start.row = selectionMarker.end.row = line || 0;
-        popup.session._emit("changeBackMarker");
-        popup.moveCursorTo(line || 0, 0);
+        if (selectionMarker.start.row != line) {
+            popup.selection.clearSelection();
+            selectionMarker.start.row = selectionMarker.end.row = line || 0;
+            popup.session._emit("changeBackMarker");
+            popup.moveCursorTo(line || 0, 0);
+        }
     };
 
     popup.hide = function() {