diff --git a/apps/common/main/lib/controller/HintManager.js b/apps/common/main/lib/controller/HintManager.js
index de1d4703c5..cf913714e0 100644
--- a/apps/common/main/lib/controller/HintManager.js
+++ b/apps/common/main/lib/controller/HintManager.js
@@ -324,7 +324,7 @@ Common.UI.HintManager = new(function() {
                 index++;
             }
             var title = el.attr('data-hint-title');
-            if (!title) {
+            if (!title && !(index > _arrLetters.length)) {
                 el.attr('data-hint-title', _arrLetters[index].toUpperCase());
                 index++;
             }