diff --git a/functions/account_functions.php b/functions/account_functions.php
index 86fee69..1595db4 100644
--- a/functions/account_functions.php
+++ b/functions/account_functions.php
@@ -25,7 +25,7 @@ function user_id_exists($user_id)
 
 function username_exists($username)
 {
-    $result = exec_stmt('SELECT username FROM user WHERE username = "?"', 'i', $username)->fetch_assoc();
+    $result = exec_stmt('SELECT username FROM user WHERE username = ?', 'i', $username)->fetch_assoc();
 
     if ($result == null)
         return false;