diff --git a/apps/common/main/lib/component/HintManager.js b/apps/common/main/lib/component/HintManager.js
index b3aab207a..f798efdb8 100644
--- a/apps/common/main/lib/component/HintManager.js
+++ b/apps/common/main/lib/component/HintManager.js
@@ -471,7 +471,9 @@ Common.UI.HintManager = new(function() {
                         match = false;
                     var keyCode = e.keyCode;
                     if (keyCode !== 16 && keyCode !== 17 && keyCode !== 18 && keyCode !== 91) {
-                        curLetter = _lang === 'en' ? ((keyCode > 47 && keyCode < 58 || keyCode > 64 && keyCode < 91) ? String.fromCharCode(e.keyCode) : null) : e.key;
+                        curLetter = _lang === 'en' ?
+                            ((keyCode > 47 && keyCode < 58 || keyCode > 64 && keyCode < 91) ? String.fromCharCode(e.keyCode) : null) :
+                            (/[.*+?^${}()|[\]\\]/g.test(e.key) ? null : e.key);
                     }
                     if (curLetter) {
                         var curr;