diff --git a/OsuLazerServer/Controllers/Users/UsersController.cs b/OsuLazerServer/Controllers/Users/UsersController.cs
index 2c88820cdace386a072716fa5e665ffe82478a4a..add28c6250b892e847e68c2406585b507c859b44 100644
--- a/OsuLazerServer/Controllers/Users/UsersController.cs
+++ b/OsuLazerServer/Controllers/Users/UsersController.cs
@@ -100,7 +100,7 @@ public class UsersController : Controller
                 Username = new[] {"Username or email already took"}
             });
 
-        if (!Regex.IsMatch(body.Username, @"^[a-zA-Z0-9_-\ ]{3,15}$"))
+        if (!Regex.IsMatch(body.Username, @"^[a-zA-Z0-9_-]{3,15}$"))
             return await GenerateRegistrationError(new RegistrationRequestErrors.UserErrors
             {
                 Username = new[] {"Invalid username"}