diff --git a/src/sass/gtk/_common-3.0.scss b/src/sass/gtk/_common-3.0.scss
index a0b6864..c03882b 100644
--- a/src/sass/gtk/_common-3.0.scss
+++ b/src/sass/gtk/_common-3.0.scss
@@ -1378,7 +1378,8 @@ actionbar {
   border-top: 1px solid $borders_color;
   background-color: darken($bg_color, 3%);
 
-  .background.csd revealer > & {
+  .background.csd revealer > &,
+  .background.csd > box.vertical > & {
     border-radius: 0 0 $wm_radius $wm_radius;
   }
 }