From fb48214d6257a87d56ddf359ee0d9950e12bfd5c Mon Sep 17 00:00:00 2001
From: Marija Najdova <mnajdova@gmail.com>
Date: Thu, 28 Jan 2021 09:30:11 +0100
Subject: [PATCH] Update
 packages/material-ui/src/TabScrollButton/TabScrollButton.js

---
 packages/material-ui/src/TabScrollButton/TabScrollButton.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/material-ui/src/TabScrollButton/TabScrollButton.js b/packages/material-ui/src/TabScrollButton/TabScrollButton.js
index 9169898d9735a4..87310e637fb873 100644
--- a/packages/material-ui/src/TabScrollButton/TabScrollButton.js
+++ b/packages/material-ui/src/TabScrollButton/TabScrollButton.js
@@ -16,7 +16,7 @@ const overridesResolver = (props, styles) => {
   const { styleProps } = props;
 
   return deepmerge(styles.root || {}, {
-    ...styles[styleProps.orientation],
+    ...(styleProps.orientation && styles[styleProps.orientation]),
   });
 };