diff --git a/components/style/values/computed/basic_shape.rs b/components/style/values/computed/basic_shape.rs
index f46edcfae0a..2b3cebb869b 100644
--- a/components/style/values/computed/basic_shape.rs
+++ b/components/style/values/computed/basic_shape.rs
@@ -41,7 +41,8 @@ impl ToCss for Circle {
         dest.write_str("circle(")?;
         self.radius.to_css(dest)?;
         dest.write_str(" at ")?;
-        self.position.to_css(dest)
+        self.position.to_css(dest)?;
+        dest.write_str(")")
     }
 }