diff --git a/common/content/dactyl.js b/common/content/dactyl.js
index 71979f4e..0505f40a 100644
--- a/common/content/dactyl.js
+++ b/common/content/dactyl.js
@@ -1372,9 +1372,9 @@ const Dactyl = Module("dactyl", {
                         services.get("extensionManager").uninstallItem(this.id);
                     };
                     addon.appDisabled = false;
-                    addon.__defineGetter__("userDisabled", function () getRdfProperty(addon, "userDisabled") == "true");
+                    addon.__defineGetter__("userDisabled", function () getRdfProperty(addon, "userDisabled") === "true");
                     addon.__defineSetter__("userDisabled", function (val) {
-                        services.get("extensionManager")[val ? "enableItem" : "disableItem"](this.id);
+                        services.get("extensionManager")[val ? "disableItem" : "enableItem"](this.id);
                     });
 
                     return callback(addon);