diff --git a/docs/src/pages/customization/themes/OverridesCss.js b/docs/src/pages/customization/themes/OverridesCss.js
index 3dc60bbabad678..36e4052110cb30 100644
--- a/docs/src/pages/customization/themes/OverridesCss.js
+++ b/docs/src/pages/customization/themes/OverridesCss.js
@@ -4,7 +4,7 @@ import Button from '@material-ui/core/Button';
 
 const theme = createMuiTheme({
   overrides: {
-    // Name of the component ⚛️ / style shee
+    // Name of the component ⚛️ / style sheet
     MuiButton: {
       // Name of the rule
       root: {
diff --git a/docs/src/pages/customization/themes/themes.md b/docs/src/pages/customization/themes/themes.md
index ba8a6f5f3cbd5c..c86ce648621825 100644
--- a/docs/src/pages/customization/themes/themes.md
+++ b/docs/src/pages/customization/themes/themes.md
@@ -310,7 +310,7 @@ That's a really powerful feature.
 ```js
 const theme = createMuiTheme({
   overrides: {
-    MuiButton: { // Name of the component ⚛️ / style shee
+    MuiButton: { // Name of the component ⚛️ / style sheet
       root: { // Name of the rule
         color: 'white', // Some CSS
       },