diff --git a/dev/scss/main/buttongroup.scss b/dev/scss/main/buttongroup.scss
index db3462a..6a89297 100644
--- a/dev/scss/main/buttongroup.scss
+++ b/dev/scss/main/buttongroup.scss
@@ -5,6 +5,7 @@
  * Define the base layout of horizontal button groups
  */
 .button-group {
+  font-size: 0;
   > span {
     cursor: pointer;
   }