diff --git a/data/theme/gnome-shell-sass/_common.scss b/data/theme/gnome-shell-sass/_common.scss
index 0587b1579..79c96001f 100644
--- a/data/theme/gnome-shell-sass/_common.scss
+++ b/data/theme/gnome-shell-sass/_common.scss
@@ -160,7 +160,7 @@ stage {
   }
 
   &:first-child:last-child {
-    border-radius: 0 0 $modal_radius;
+    border-radius: 0 0 $modal_radius $modal_radius;
     margin-left: 0 !important;
     margin-right: 0 !important;
   }