diff --git a/dist/css/bootstrap.css b/dist/css/bootstrap.css
index 630e70870d..68c37e03cb 100644
--- a/dist/css/bootstrap.css
+++ b/dist/css/bootstrap.css
@@ -6261,8 +6261,8 @@ button.close {
 
     -webkit-backface-visibility: hidden;
             backface-visibility: hidden;
-    -webkit-perspective: 1000;
-            perspective: 1000;
+    -webkit-perspective: 1000px;
+            perspective: 1000px;
   }
   .carousel-inner > .item.next,
   .carousel-inner > .item.active.right {
diff --git a/less/carousel.less b/less/carousel.less
index 4bbe946d3a..6458297c6b 100644
--- a/less/carousel.less
+++ b/less/carousel.less
@@ -29,7 +29,7 @@
     @media all and (transform-3d), (-webkit-transform-3d) {
       .transition-transform(~'0.6s ease-in-out');
       .backface-visibility(~'hidden');
-      .perspective(1000);
+      .perspective(1000px);
 
       &.next,
       &.active.right {