diff --git a/select2.js b/select2.js
index a0bc540d..b7bd4b42 100644
--- a/select2.js
+++ b/select2.js
@@ -1251,6 +1251,7 @@ the specific language governing permissions and limitations under the Apache Lic
                 // Add scrollbar width to dropdown if vertical scrollbar is present
                 dropWidth = $dropdown.outerWidth(false) + (resultsListNode.scrollHeight === resultsListNode.clientHeight ? 0 : scrollBarDimensions.width);
                 dropWidth > width ? width = dropWidth : dropWidth = width;
+                dropHeight = $dropdown.outerHeight(false);
                 enoughRoomOnRight = dropLeft + dropWidth <= viewPortRight;
             }
             else {