diff --git a/packages/x-data-grid/src/hooks/features/sorting/useGridSorting.ts b/packages/x-data-grid/src/hooks/features/sorting/useGridSorting.ts
index ac8fea102aa88..f90c70704bd46 100644
--- a/packages/x-data-grid/src/hooks/features/sorting/useGridSorting.ts
+++ b/packages/x-data-grid/src/hooks/features/sorting/useGridSorting.ts
@@ -190,7 +190,7 @@ export const useGridSorting = (
     (field, direction, allowMultipleSorting) => {
       const column = apiRef.current.getColumn(field);
       const sortItem = createSortItem(column, direction);
-      let sortModel: GridSortItem[];
+      let sortModel: GridSortModel;
       if (!allowMultipleSorting || props.disableMultipleColumnsSorting) {
         sortModel = sortItem?.sort == null ? [] : [sortItem];
       } else {
diff --git a/packages/x-data-grid/src/models/gridSortModel.ts b/packages/x-data-grid/src/models/gridSortModel.ts
index 849f31ba6dce8..655c1650dce8b 100644
--- a/packages/x-data-grid/src/models/gridSortModel.ts
+++ b/packages/x-data-grid/src/models/gridSortModel.ts
@@ -37,4 +37,4 @@ export interface GridSortItem {
 /**
  * The model used for sorting the grid.
  */
-export type GridSortModel = GridSortItem[];
+export type GridSortModel = readonly GridSortItem[];
diff --git a/packages/x-data-grid/src/tests/DataGrid.spec.tsx b/packages/x-data-grid/src/tests/DataGrid.spec.tsx
index c82da0c7f74e6..39f7f3d49c5fc 100644
--- a/packages/x-data-grid/src/tests/DataGrid.spec.tsx
+++ b/packages/x-data-grid/src/tests/DataGrid.spec.tsx
@@ -279,3 +279,10 @@ function ApiRefProMethods() {
 
   return null;
 }
+
+function ImmutableProps() {
+  const rows = [] as const;
+  const columns = [] as const;
+  const initialState = { sorting: { sortModel: [{ field: 'id', sort: 'asc' }] } } as const;
+  return <DataGrid rows={rows} columns={columns} initialState={initialState} />;
+}
\ No newline at end of file