diff --git a/src/Credit/CreditSystem.php b/src/Credit/CreditSystem.php
index 8c1f04d..ab07f20 100644
--- a/src/Credit/CreditSystem.php
+++ b/src/Credit/CreditSystem.php
@@ -39,7 +39,7 @@ public function __construct(
 
     public function getUserCredit($userid)
     {
-        $result = $this->db->query("SELECT credit FROM credit WHERE id = '$userid'");
+        $result = $this->db->query("SELECT credit FROM credit WHERE userId = '$userid'");
         if ($result->rowCount() == 0) {
             return 0;
         }
diff --git a/tests/Credit/CreditSystemTest.php b/tests/Credit/CreditSystemTest.php
index 7f5b4a9..f95656e 100644
--- a/tests/Credit/CreditSystemTest.php
+++ b/tests/Credit/CreditSystemTest.php
@@ -83,7 +83,7 @@ public function testGetUserCredit()
         $db = $this->createMock(DbInterface::class);
         $db->expects($this->once())
             ->method('query')
-            ->with("SELECT credit FROM credit WHERE id = '$userId'")
+            ->with("SELECT credit FROM credit WHERE userId = '$userId'")
             ->willReturn($dbResult);
 
         $creditSystem = new CreditSystem(['isEnabled' => true], $db);
@@ -102,7 +102,7 @@ public function testGetUserCreditNotFoundUser()
         $db = $this->createMock(DbInterface::class);
         $db->expects($this->once())
             ->method('query')
-            ->with("SELECT credit FROM credit WHERE id = '$userId'")
+            ->with("SELECT credit FROM credit WHERE userId = '$userId'")
             ->willReturn($dbResult);
 
         $creditSystem = new CreditSystem(['isEnabled' => true], $db);