diff --git a/less/button-groups.less b/less/button-groups.less
index 4f37c6b41d..293245a650 100644
--- a/less/button-groups.less
+++ b/less/button-groups.less
@@ -173,14 +173,12 @@
     border-radius: 0;
   }
   &:first-child:not(:last-child) {
-    border-top-left-radius: @btn-border-radius-base;
-    border-top-right-radius: @btn-border-radius-base;
+    .border-top-radius(@btn-border-radius-base);
     .border-bottom-radius(0);
   }
   &:last-child:not(:first-child) {
-    border-bottom-left-radius: @btn-border-radius-base;
-    border-bottom-right-radius: @btn-border-radius-base;
     .border-top-radius(0);
+    .border-bottom-radius(@btn-border-radius-base);
   }
 }
 .btn-group-vertical > .btn-group:not(:first-child):not(:last-child) > .btn {