diff --git a/src/index.tsx b/src/index.tsx
index 607396d..7f7d1c0 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -16,7 +16,7 @@ export interface Props {
 
 const VisibilitySensor: React.FC<Props> = (props) => {
   const myView: any = useRef(null);
-  const [lastValue, setLastValue] = useState<boolean>(false);
+  const [lastValue, setLastValue] = useState<boolean | null>(null);
   const [dimensions, setDimensions] = useState<IDimensionData>({
     rectTop: 0,
     rectBottom: 0,
@@ -26,7 +26,6 @@ const VisibilitySensor: React.FC<Props> = (props) => {
   let interval: any = null;
 
   useEffect(() => {
-    setLastValue(false);
     startWatching();
     isInViewPort();
     return stopWatching;