diff --git a/app/assets/javascripts/select-kit/addon/components/dropdown-select-box/dropdown-select-box-header.hbs b/app/assets/javascripts/select-kit/addon/components/dropdown-select-box/dropdown-select-box-header.hbs
index bd796e2cccb..f9a68e025a3 100644
--- a/app/assets/javascripts/select-kit/addon/components/dropdown-select-box/dropdown-select-box-header.hbs
+++ b/app/assets/javascripts/select-kit/addon/components/dropdown-select-box/dropdown-select-box-header.hbs
@@ -12,4 +12,6 @@
   {{#if this.selectKit.options.showCaret}}
     {{d-icon this.caretIcon class="caret-icon"}}
   {{/if}}
+  ​
+  {{! Zero-width space character, so icon-only button height = regular button height }}
 </div>
\ No newline at end of file