diff --git a/js/data/achievements.js b/js/data/achievements.js
index 1df8cb3..4d08b34 100644
--- a/js/data/achievements.js
+++ b/js/data/achievements.js
@@ -171,7 +171,7 @@ addLayer("ach", {
         "achievements"
     ],
     tooltip() {
-        return format(player[this.layer].achievements.length) + " achievement" + format(player[this.layer].achievements.length == 1 ? "" : "s")
+        return format(player[this.layer].achievements.length) + " achievement" + (player[this.layer].achievements.length == 1 ? "" : "s")
     },
     row: "side", // Row the layer is in on the tree (0 is the first row)
     layerShown(){return true}