diff --git a/api/modules/session/models/JoinForm.php b/api/modules/session/models/JoinForm.php
index 22478f6..b8b2aff 100644
--- a/api/modules/session/models/JoinForm.php
+++ b/api/modules/session/models/JoinForm.php
@@ -126,7 +126,7 @@ class JoinForm extends Model {
 
         $selectedProfile = $this->selectedProfile;
         $isUuid = StringHelper::isUuid($selectedProfile);
-        if ($isUuid && $account->uuid !== $selectedProfile) {
+        if ($isUuid && $account->uuid !== $this->normalizeUUID($selectedProfile)) {
             Session::error(
                 "User with access_token = '{$accessToken}' trying to join with identity = '{$selectedProfile}'," .
                 " but access_token issued to account with id = '{$account->uuid}'."
@@ -149,4 +149,8 @@ class JoinForm extends Model {
         return $this->account;
     }
 
+    private function normalizeUUID(string $uuid): string {
+        return Uuid::fromString($uuid)->toString();
+    }
+
 }
diff --git a/tests/codeception/api/functional/sessionserver/JoinCest.php b/tests/codeception/api/functional/sessionserver/JoinCest.php
index af67ed6..1d539a1 100644
--- a/tests/codeception/api/functional/sessionserver/JoinCest.php
+++ b/tests/codeception/api/functional/sessionserver/JoinCest.php
@@ -52,6 +52,17 @@ class JoinCest {
         $this->expectSuccessResponse($I);
     }
 
+    public function joinByOauth2TokenWithNotDashedUUID(OauthSteps $I) {
+        $I->wantTo('join to server, using modern oAuth2 generated token and non dashed uuid');
+        $accessToken = $I->getAccessToken([P::MINECRAFT_SERVER_SESSION]);
+        $this->route->join([
+            'accessToken' => $accessToken,
+            'selectedProfile' => 'df936908b2e1544d96f82977ec213022',
+            'serverId' => Uuid::uuid(),
+        ]);
+        $this->expectSuccessResponse($I);
+    }
+
     public function joinByModernOauth2TokenWithoutPermission(OauthSteps $I) {
         $I->wantTo('join to server, using moder oAuth2 generated token, but without minecraft auth permission');
         $accessToken = $I->getAccessToken(['account_info', 'account_email']);