diff --git a/Shogi.Api/Controllers/SessionsController.cs b/Shogi.Api/Controllers/SessionsController.cs
index 1d167c4..d6b5ba2 100644
--- a/Shogi.Api/Controllers/SessionsController.cs
+++ b/Shogi.Api/Controllers/SessionsController.cs
@@ -118,6 +118,7 @@ public class SessionsController : ControllerBase
     {
       session.AddPlayer2(User.GetShogiUserId());
     }
+    return this.Ok();
   }
 
   [HttpPatch("{sessionName}/Move")]