diff --git a/src/js/select2/data/tags.js b/src/js/select2/data/tags.js
index db42faab..7bb45c94 100644
--- a/src/js/select2/data/tags.js
+++ b/src/js/select2/data/tags.js
@@ -53,7 +53,10 @@ define([
           }, true)
         );
 
-        var checkText = option.text === params.term;
+        var optionText = (option.text || '').toUpperCase();
+        var paramsTerm = (params.term || '').toUpperCase();
+
+        var checkText = optionText === paramsTerm;
 
         if (checkText || checkChildren) {
           if (child) {