diff --git a/src/Umbraco.Core/Services/UserService.cs b/src/Umbraco.Core/Services/UserService.cs
index 89f2f9f7de..efa4812055 100644
--- a/src/Umbraco.Core/Services/UserService.cs
+++ b/src/Umbraco.Core/Services/UserService.cs
@@ -152,7 +152,7 @@ namespace Umbraco.Core.Services
         {
             using (var repository = _repositoryFactory.CreateUserRepository(_uowProvider.GetUnitOfWork()))
             {
-                var query = Query<IUser>.Builder.Where(x => x.Username == login);
+                var query = Query<IUser>.Builder.Where(x => x.Username.Equals(login));
                 return repository.GetByQuery(query).FirstOrDefault();
             }
         }