diff --git a/packages/material-ui-lab/src/Skeleton/Skeleton.js b/packages/material-ui-lab/src/Skeleton/Skeleton.js
index 07ab13aba00385..f27c06dca00d17 100644
--- a/packages/material-ui-lab/src/Skeleton/Skeleton.js
+++ b/packages/material-ui-lab/src/Skeleton/Skeleton.js
@@ -30,8 +30,7 @@ export const styles = theme => ({
   },
   /* Styles applied to the root element if `disabledAnimate={false}`. */
   animate: {
-    animation: '$animate 1.5s ease-in-out infinite',
-    animationDelay: '0.5s',
+    animation: '$animate 1.5s ease-in-out 0.5s infinite',
   },
   '@keyframes animate': {
     '0%': {