From 0863bbad0744ada6db5d19b10075b738f4c65de1 Mon Sep 17 00:00:00 2001
From: Tom Crockett <pelotom@gmail.com>
Date: Mon, 11 Jun 2018 09:46:16 -0700
Subject: [PATCH] Re-add default parameter of string for WithStyles (#11808)

---
 packages/material-ui/src/styles/withStyles.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/material-ui/src/styles/withStyles.d.ts b/packages/material-ui/src/styles/withStyles.d.ts
index d5d420c40cd6eb..f105b15524f383 100644
--- a/packages/material-ui/src/styles/withStyles.d.ts
+++ b/packages/material-ui/src/styles/withStyles.d.ts
@@ -38,7 +38,7 @@ export interface WithStylesOptions<ClassKey extends string = string>
 
 export type ClassNameMap<ClassKey extends string = string> = Record<ClassKey, string>;
 
-export type WithStyles<T extends string | StyleRules | StyleRulesCallback> = Partial<WithTheme> & {
+export type WithStyles<T extends string | StyleRules | StyleRulesCallback = string> = Partial<WithTheme> & {
   classes: ClassNameMap<
     T extends string
       ? T