diff --git a/src/base/combination/tab.js b/src/base/combination/tab.js
index 30259e71a..2d88a81e4 100644
--- a/src/base/combination/tab.js
+++ b/src/base/combination/tab.js
@@ -92,7 +92,7 @@ BI.Tab = BI.inherit(BI.Widget, {
     created: function () {
         var o = this.options;
         if (o.showIndex !== false) {
-            this.setSelect(o.showIndex);
+            this.setSelect(BI.isFunction(o.showIndex) ? o.showIndex() : o.showIndex);
         }
     },