diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index b92747eb5e..1b03c4d16f 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -3224,7 +3224,6 @@ expander-widget {
 calendar {
   color: $text_color;
   border: 1px solid $borders_color;
-  border-radius: $window_radius;
 
   > header {
     border-bottom: 1px solid $borders_color;