diff --git a/src/client/Main.ts b/src/client/Main.ts
index 837887c7a..07fda48cd 100644
--- a/src/client/Main.ts
+++ b/src/client/Main.ts
@@ -647,7 +647,7 @@ class Client {
         return;
       }
 
-      const patternName = params.get("pattern");
+      const patternName = params.get("cosmetic");
       if (!patternName) {
         alert("Something went wrong. Please contact support.");
         console.error("purchase-completed but no pattern name");