diff --git a/packages/ra-ui-materialui/src/input/CheckboxGroupInput.tsx b/packages/ra-ui-materialui/src/input/CheckboxGroupInput.tsx
index fab7faa9248..c3dec2ec0d4 100644
--- a/packages/ra-ui-materialui/src/input/CheckboxGroupInput.tsx
+++ b/packages/ra-ui-materialui/src/input/CheckboxGroupInput.tsx
@@ -17,6 +17,7 @@ const sanitizeRestProps = ({
     setFilter,
     setPagination,
     setSort,
+    loaded,
     ...rest
 }: any) => defaultSanitizeRestProps(rest);
 
@@ -201,7 +202,7 @@ const CheckboxGroupInput: FunctionComponent<
 };
 
 CheckboxGroupInput.propTypes = {
-    choices: PropTypes.arrayOf(PropTypes.object).isRequired,
+    choices: PropTypes.arrayOf(PropTypes.object),
     className: PropTypes.string,
     label: PropTypes.string,
     source: PropTypes.string,