diff --git a/src/base/list/virtualgrouplist.js b/src/base/list/virtualgrouplist.js
index a1836ba94..a4a811c73 100644
--- a/src/base/list/virtualgrouplist.js
+++ b/src/base/list/virtualgrouplist.js
@@ -79,7 +79,7 @@ BI.VirtualGroupList = BI.inherit(BI.Widget, {
     },
 
     _isAutoHeight: function () {
-        return this.options.rowHeight === "auto";
+        return !BI.isNumber(this.options.rowHeight);
     },
 
     _renderMoreIf: function () {