diff --git a/packages/material-ui-styles/src/ThemeProvider/nested.js b/packages/material-ui-styles/src/ThemeProvider/nested.js
index dfd3b64bce87ae..5e75d0d8dabf9c 100644
--- a/packages/material-ui-styles/src/ThemeProvider/nested.js
+++ b/packages/material-ui-styles/src/ThemeProvider/nested.js
@@ -1,3 +1,3 @@
 const hasSymbol = typeof Symbol === 'function';
 
-export default (hasSymbol ? Symbol.for('nested') : '__THEME_NESTED__');
+export default (hasSymbol ? Symbol.for('mui.nested') : '__THEME_NESTED__');