diff --git a/ext/fg/js/popup-proxy-host.js b/ext/fg/js/popup-proxy-host.js
index b9a5617c..7d86aa67 100644
--- a/ext/fg/js/popup-proxy-host.js
+++ b/ext/fg/js/popup-proxy-host.js
@@ -116,8 +116,8 @@ class PopupProxyHost {
 
     async _onApiContainsPoint({id, x, y}) {
         const popup = this._getPopup(id);
-        const rootPagePoint = PopupProxyHost._convertPopupPointToRootPagePoint(popup, x, y);
-        return await popup.containsPoint(...rootPagePoint);
+        [x, y] = PopupProxyHost._convertPopupPointToRootPagePoint(popup, x, y);
+        return await popup.containsPoint(x, y);
     }
 
     async _onApiShowContent({id, elementRect, writingMode, type, details}) {