diff --git a/src/client/styles/app.styl b/src/client/styles/app.styl
index e6fa5802..84d1832d 100644
--- a/src/client/styles/app.styl
+++ b/src/client/styles/app.styl
@@ -300,6 +300,7 @@ button:hover .icon
       font-size 13px
       border-top-left-radius 4px
       border-top-right-radius 4px
+      border 1px solid transparent
 
       &.active, &.active:hover
         border 1px solid #096ac8