diff --git a/src/theme/book.js b/src/theme/book.js
index 2cfa4821af..a4e55cda67 100644
--- a/src/theme/book.js
+++ b/src/theme/book.js
@@ -591,6 +591,6 @@ function playpen_text(playpen) {
             menu.classList.remove('bordered');
         }
 
-        previousScrollTop = document.scrollingElement.scrollTop;
+        previousScrollTop = Math.max(document.scrollingElement.scrollTop, 0);
     }, { passive: true });
 })();