diff --git a/packages/ra-ui-materialui/src/detail/Edit.js b/packages/ra-ui-materialui/src/detail/Edit.js
index 5c39955a247..1315308dce0 100644
--- a/packages/ra-ui-materialui/src/detail/Edit.js
+++ b/packages/ra-ui-materialui/src/detail/Edit.js
@@ -70,7 +70,7 @@ Edit.propTypes = {
     successMessage: PropTypes.string,
 };
 
-export const useStyles = makeStyles({
+const useStyles = makeStyles({
     root: {},
     main: {
         display: 'flex',
diff --git a/packages/ra-ui-materialui/src/detail/Show.js b/packages/ra-ui-materialui/src/detail/Show.js
index 6b6ba148924..a5b9d0f3441 100644
--- a/packages/ra-ui-materialui/src/detail/Show.js
+++ b/packages/ra-ui-materialui/src/detail/Show.js
@@ -67,7 +67,7 @@ Show.propTypes = {
     title: PropTypes.node,
 };
 
-export const useStyles = makeStyles({
+const useStyles = makeStyles({
     root: {},
     main: {
         display: 'flex',
diff --git a/packages/ra-ui-materialui/src/list/List.js b/packages/ra-ui-materialui/src/list/List.js
index 01a28c4e2e6..776898dba11 100644
--- a/packages/ra-ui-materialui/src/list/List.js
+++ b/packages/ra-ui-materialui/src/list/List.js
@@ -19,7 +19,7 @@ import DefaultActions from './ListActions';
 
 const DefaultBulkActionButtons = props => <BulkDeleteButton {...props} />;
 
-export const useStyles = makeStyles(theme => ({
+const useStyles = makeStyles(theme => ({
     root: {},
     main: {
         display: 'flex',