diff --git a/src/App/Pages/Accounts/TwoFactorPageViewModel.cs b/src/App/Pages/Accounts/TwoFactorPageViewModel.cs
index 15de50f51..7de82e1f8 100644
--- a/src/App/Pages/Accounts/TwoFactorPageViewModel.cs
+++ b/src/App/Pages/Accounts/TwoFactorPageViewModel.cs
@@ -29,6 +29,7 @@ namespace Bit.App.Pages
         private readonly IBroadcasterService _broadcasterService;
         private readonly IStateService _stateService;
         private readonly II18nService _i18nService;
+        private readonly IAppIdService _appIdService;
 
         private TwoFactorProviderType? _selectedProviderType;
         private string _totpInstruction;
@@ -49,6 +50,7 @@ namespace Bit.App.Pages
             _broadcasterService = ServiceContainer.Resolve<IBroadcasterService>("broadcasterService");
             _stateService = ServiceContainer.Resolve<IStateService>("stateService");
             _i18nService = ServiceContainer.Resolve<II18nService>("i18nService");
+            _appIdService = ServiceContainer.Resolve<IAppIdService>("appIdService");
 
             PageTitle = AppResources.TwoStepLogin;
             SubmitCommand = new Command(async () => await SubmitAsync());
@@ -380,7 +382,8 @@ namespace Bit.App.Pages
                 var request = new TwoFactorEmailRequest
                 {
                     Email = _authService.Email,
-                    MasterPasswordHash = _authService.MasterPasswordHash
+                    MasterPasswordHash = _authService.MasterPasswordHash,
+                    DeviceIdentifier = await _appIdService.GetAppIdAsync()
                 };
                 await _apiService.PostTwoFactorEmailAsync(request);
                 if (showLoading)
diff --git a/src/Core/Models/Request/TwoFactorEmailRequest.cs b/src/Core/Models/Request/TwoFactorEmailRequest.cs
index 3446df586..2b5784099 100644
--- a/src/Core/Models/Request/TwoFactorEmailRequest.cs
+++ b/src/Core/Models/Request/TwoFactorEmailRequest.cs
@@ -4,5 +4,6 @@
     {
         public string Email { get; set; }
         public string MasterPasswordHash { get; set; }
+        public string DeviceIdentifier { get; set; }
     }
 }