diff --git a/lib/common/components/StickySidebar/sticky-sidebar.js b/lib/common/components/StickySidebar/sticky-sidebar.js
index <HASH>..<HASH> 100644
--- a/lib/common/components/StickySidebar/sticky-sidebar.js
+++ b/lib/common/components/StickySidebar/sticky-sidebar.js
@@ -47,7 +47,7 @@ export default class StickySidebar {
   }
 
   get scrollY() {
-    return (this.scrollParent.pageYOffset !== null) ? this.scrollParent.pageYOffset : this.scrollParent.scrollTop;
+    return (this.scrollParent.pageYOffset != null) ? this.scrollParent.pageYOffset : this.scrollParent.scrollTop;
   }
 
   ngOnInit() {
Fix sticky sidebar when scroll parent is not window