diff --git a/server/controllers/itemdetail_query.php b/server/controllers/itemdetail_query.php
index 273cfd436a271e0b9ad098ccafce77f3b327b437..f6daf49f76574708c033df37f4870d4ab9370c16 100644
--- a/server/controllers/itemdetail_query.php
+++ b/server/controllers/itemdetail_query.php
@@ -3,7 +3,7 @@
     global $conn; $conn = connect_database();
     if ($_SERVER["REQUEST_METHOD"] == "POST" and $_POST["signal"] == "make-purchase") {
         global $conn;
-        $query = "SELECT * FROM `item` WHERE username = (?)
+        $query = "SELECT * FROM `item` WHERE item_id = (?)
         ";
         $item_id = $_POST["item_id"];