diff --git a/src/index.d.ts b/src/index.d.ts
index 47ceb58..85f21f1 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -45,6 +45,7 @@ export interface RenderableProps<T> {
 export interface FieldArrayProps
   extends RenderableProps<FieldArrayRenderProps> {
   name: string
+  isEqual?: (a: any, b: any) => boolean
   subscription?: FieldSubscription
   validate?: (value: any, allValues: object) => any
 }