diff --git a/mods/invertscroll.js b/mods/invertscroll.js
index 941389f5..4cebc6fb 100644
--- a/mods/invertscroll.js
+++ b/mods/invertscroll.js
@@ -1,5 +1,5 @@
 runAfterLoad(function() {
-    if (settings.invertscroll = true) {
+    if (settings.invertscroll === undefined && navigator.platform.toUpperCase().indexOf('MAC')>=0) {
         settings.invertscroll = false;
     }
     else {