diff --git a/less/navbar.less b/less/navbar.less
index c2872e64aa..60f5fd4f71 100644
--- a/less/navbar.less
+++ b/less/navbar.less
@@ -186,13 +186,11 @@
 // Menu position and menu carets
 .navbar-nav > li > .dropdown-menu {
   margin-top: 0;
-  border-top-left-radius: 0;
-  border-top-right-radius: 0;
+  .border-top-radius(0);
 }
 // Menu position and menu caret support for dropups via extra dropup class
 .navbar-fixed-bottom .navbar-nav > li > .dropdown-menu {
-  border-bottom-left-radius: 0;
-  border-bottom-right-radius: 0;
+  .border-bottom-radius(0);
 }
 
 // Dropdown menu items and carets