diff --git a/packages/mui-material/src/Autocomplete/Autocomplete.d.ts b/packages/mui-material/src/Autocomplete/Autocomplete.d.ts
index bc93447fab6e13..d196d142531e42 100644
--- a/packages/mui-material/src/Autocomplete/Autocomplete.d.ts
+++ b/packages/mui-material/src/Autocomplete/Autocomplete.d.ts
@@ -249,7 +249,7 @@ export interface AutocompleteProps<
    * @returns {ReactNode}
    */
   renderOption?: (
-    props: React.HTMLAttributes<HTMLLIElement>,
+    props: React.HTMLAttributes<HTMLLIElement> & { key: any },
     option: Value,
     state: AutocompleteRenderOptionState,
     ownerState: AutocompleteOwnerState<Value, Multiple, DisableClearable, FreeSolo, ChipComponent>,