diff --git a/src/useThrottledCallback/index.ts b/src/useThrottledCallback/index.ts
index 326ae80c2..d64a51051 100644
--- a/src/useThrottledCallback/index.ts
+++ b/src/useThrottledCallback/index.ts
@@ -28,6 +28,7 @@ export function useThrottledCallback<Fn extends (...args: any[]) => any>(
   useUnmountEffect(() => {
     if (timeout.current) {
       clearTimeout(timeout.current);
+      timeout.current = undefined;
     }
   });