diff --git a/src/wp-content/themes/twentytwenty/assets/js/index.js b/src/wp-content/themes/twentytwenty/assets/js/index.js
index 17290b38fa..1ed91c53f5 100644
--- a/src/wp-content/themes/twentytwenty/assets/js/index.js
+++ b/src/wp-content/themes/twentytwenty/assets/js/index.js
@@ -190,7 +190,7 @@ twentytwenty.coverModals = {
 					htmlStyle.setProperty( styleKey, styles[ styleKey ] );
 				} );
 
-				_win.twentytwenty.scrolled = parseInt( styles.top );
+				_win.twentytwenty.scrolled = parseInt( styles.top, 10 );
 
 				if ( adminBar ) {
 					_doc.body.style.setProperty( 'padding-top', paddingTop );