diff --git a/packages/ra-core/src/CoreAdminRouter.js b/packages/ra-core/src/CoreAdminRouter.js
index af39cbd0b9a..848b478b3bd 100644
--- a/packages/ra-core/src/CoreAdminRouter.js
+++ b/packages/ra-core/src/CoreAdminRouter.js
@@ -135,19 +135,13 @@ export class CoreAdminRouter extends Component {
                 <Switch>
                     {customRoutes
                         .filter(route => route.props.noLayout)
-                        .map((route, index) => (
-                            <Route
-                                key={index}
-                                exact={route.props.exact}
-                                path={route.props.path}
-                                render={props =>
-                                    this.renderCustomRoutesWithoutLayout(
-                                        route,
-                                        props
-                                    )
-                                }
-                            />
-                        ))}
+                        .map((route) => cloneElement(route, {
+                          render: props =>
+                            this.renderCustomRoutesWithoutLayout(
+                              route,
+                              props
+                            )
+                        }))}
                     <Route
                         path="/"
                         render={() =>
diff --git a/packages/ra-core/src/RoutesWithLayout.js b/packages/ra-core/src/RoutesWithLayout.js
index af619c7675e..1166687cc75 100644
--- a/packages/ra-core/src/RoutesWithLayout.js
+++ b/packages/ra-core/src/RoutesWithLayout.js
@@ -16,17 +16,7 @@ const RoutesWithLayout = ({
 
     return (
         <Switch>
-            {customRoutes &&
-                customRoutes.map((route, index) => (
-                    <Route
-                        key={index}
-                        exact={route.props.exact}
-                        path={route.props.path}
-                        component={route.props.component}
-                        render={route.props.render}
-                        children={route.props.children} // eslint-disable-line react/no-children-prop
-                    />
-                ))}
+            {customRoutes && customRoutes.map((route) => cloneElement(route))}
             {Children.map(children, child => (
                 <Route
                     key={child.props.name}