diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index d07053d480..7d34bb7c4f 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -8,7 +8,7 @@ $backdrop_transition: 200ms ease-out;
 $button_transition: all 200ms $ease-out-quad;
 $button_radius: 5px;
 $menu_radius: 5px;
-$window_radius: $button_radius + 4;
+$window_radius: $button_radius + 5;
 
 * {
   padding: 0;