diff --git a/app/assets/stylesheets/darkswarm/modals.css.sass b/app/assets/stylesheets/darkswarm/modals.css.sass
index 086ab8b076..a4a896942b 100644
--- a/app/assets/stylesheets/darkswarm/modals.css.sass
+++ b/app/assets/stylesheets/darkswarm/modals.css.sass
@@ -26,7 +26,7 @@ dialog .close-reveal-modal, .reveal-modal .close-reveal-modal
   background-color: rgba(235,235,235,0.85)
   text-shadow: none
   padding: 0.3rem
-  @include border-radius(999999)
+  @include border-radius(999999rem)
   &:hover, &:active, &:focus
     background-color: rgba(235,235,235,1)
     color: #333