diff --git a/assets/js/papermod.js b/assets/js/papermod.js
index 8151373f..96883de9 100644
--- a/assets/js/papermod.js
+++ b/assets/js/papermod.js
@@ -107,7 +107,7 @@ function showCodeCopyButtons() {
 function openToc() {
     var toc = document.getElementById("toc");
 
-    if (toc && window.screen.width > 1500 && window.screen.height > 800) {
+    if (toc && window.innerWidth > 1500 && window.innerHeight > 800) {
         toc.open = true;
     }
 }