diff --git a/src/shared/components/challenge-listing/Tooltips/UserAvatarTooltip/style.scss b/src/shared/components/challenge-listing/Tooltips/UserAvatarTooltip/style.scss
index 415f7842f7..e9c42f4926 100644
--- a/src/shared/components/challenge-listing/Tooltips/UserAvatarTooltip/style.scss
+++ b/src/shared/components/challenge-listing/Tooltips/UserAvatarTooltip/style.scss
@@ -46,6 +46,7 @@ $avatar-radius-4: $corner-radius * 2;
     float: left;
     margin-right: $avatar-space-15;
     width: $base-unit * 10;
+    height: $base-unit * 10;
   }
 
   .handle {