diff --git a/extensions/drive-menu/extension.js b/extensions/drive-menu/extension.js
index bb18b0f..969c47b 100644
--- a/extensions/drive-menu/extension.js
+++ b/extensions/drive-menu/extension.js
@@ -178,6 +178,9 @@ class DriveMenu extends PanelMenu.Button {
     }
 
     _addMount(mount) {
+        if (this._mounts.some(item => item.mount === mount))
+            return;
+
         const item = new MountMenuItem(mount);
         this._mounts.unshift(item);
         this.menu.addMenuItem(item, 0);