diff --git a/packages/material-ui-lab/src/Skeleton/Skeleton.js b/packages/material-ui-lab/src/Skeleton/Skeleton.js
index b0cb4324a99b21..ec2181ace03ab2 100644
--- a/packages/material-ui-lab/src/Skeleton/Skeleton.js
+++ b/packages/material-ui-lab/src/Skeleton/Skeleton.js
@@ -57,7 +57,6 @@ export const styles = (theme) => ({
       left: 0,
       right: 0,
       top: 0,
-      zIndex: 1,
     },
   },
   '@keyframes wave': {