diff --git a/src/hooks/useSelect/types.ts b/src/hooks/useSelect/types.ts
index 322b413d..78f2856e 100644
--- a/src/hooks/useSelect/types.ts
+++ b/src/hooks/useSelect/types.ts
@@ -5,5 +5,5 @@ export interface GetItemIndexByCharacterKeyOptions<Item> {
   highlightedIndex: number
   items: Item[]
   itemToString(item: Item | null): string
-  isItemDisabled(item: Item, index: number): boolean
+  isItemDisabled(item: Item | undefined, index: number): boolean
 }
diff --git a/typings/index.d.ts b/typings/index.d.ts
index 0fffb6c8..71cbc8b7 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -339,7 +339,7 @@ export enum UseSelectStateChangeTypes {
 
 export interface UseSelectProps<Item> {
   items: Item[]
-  isItemDisabled?(item: Item, index: number): boolean
+  isItemDisabled?(item: Item | undefined, index: number): boolean
   itemToString?: (item: Item | null) => string
   itemToKey?: (item: Item | null) => any
   getA11yStatusMessage?: (options: UseSelectState<Item>) => string
@@ -552,7 +552,7 @@ export enum UseComboboxStateChangeTypes {
 
 export interface UseComboboxProps<Item> {
   items: Item[]
-  isItemDisabled?(item: Item, index: number): boolean
+  isItemDisabled?(item: Item | undefined, index: number): boolean
   itemToString?: (item: Item | null) => string
   itemToKey?: (item: Item | null) => any
   getA11yStatusMessage?: (options: UseComboboxState<Item>) => string