diff --git a/src/sass/gtk/_common-3.0.scss b/src/sass/gtk/_common-3.0.scss
index 3b40371b..1e371428 100644
--- a/src/sass/gtk/_common-3.0.scss
+++ b/src/sass/gtk/_common-3.0.scss
@@ -3887,14 +3887,11 @@ button.titlebutton:not(.suggested-action):not(.destructive-action) {
 
   @if $window_button == 'mac' {
     @extend %mac_window_button;
+    .background.csd headerbar.titlebar.default-decoration & { @extend %firefox_window_button; }
   } @else {
     @extend %normal_window_button;
   }
 
-  .background.csd headerbar.titlebar.default-decoration & {
-    @extend %firefox_window_button;
-  }
-
   .background.csd.maximized headerbar.titlebar.default-decoration &.maximize,
   .background.csd.fullscreen headerbar.titlebar.default-decoration &.maximize,
   .background.csd.tiled headerbar.titlebar.default-decoration &.maximize {