diff --git a/app/assets/stylesheets/common/select-kit/mini-tag-chooser.scss b/app/assets/stylesheets/common/select-kit/mini-tag-chooser.scss
index 71a8e700f76..b05db54dc35 100644
--- a/app/assets/stylesheets/common/select-kit/mini-tag-chooser.scss
+++ b/app/assets/stylesheets/common/select-kit/mini-tag-chooser.scss
@@ -58,6 +58,7 @@
         .collection-header {
           max-height: 125px;
           overflow-y: auto;
+          flex: 1 0 auto;
 
           .selected-tags {
             display: flex;