diff --git a/src/base/combination/combo.js b/src/base/combination/combo.js
index 02f838877..114e4a52e 100644
--- a/src/base/combination/combo.js
+++ b/src/base/combination/combo.js
@@ -219,7 +219,7 @@
                     },
                 },
             } : this.combo;
-            var positionRelativeElement = o.supportCSSTransform ? BI.DOM.getPositionRelativeContainingBlock(BI.Widget._renderEngine.createElement(BI.isFunction(o.container) ? o.container() : o.container)[0]) : null;
+            var positionRelativeElement = o.supportCSSTransform ? BI.DOM.getPositionRelativeContainingBlock(BI.isNull(o.container) ? this.element[0] : BI.Widget._renderEngine.createElement(BI.isFunction(o.container) ? o.container() : o.container)[0]) : null;
             switch (o.direction) {
                 case "bottom":
                 case "bottom,right":