diff --git a/gehGassi.Dto/Walks/PublicWalkRequestAcceptDto.cs b/gehGassi.Dto/Walks/PublicWalkRequestAcceptDto.cs
index 54bb222..1ae4a5d 100644
--- a/gehGassi.Dto/Walks/PublicWalkRequestAcceptDto.cs
+++ b/gehGassi.Dto/Walks/PublicWalkRequestAcceptDto.cs
@@ -40,6 +40,6 @@ namespace gehGassi.Dto.Walks
         /// <summary>
         /// Zahlungsart für den Walk
         /// </summary>
-        public WalkPaymentTypeDto PaymentType { get; set; }
+        public WalkPaymentTypeDto? PaymentType { get; set; }
     }
 }
diff --git a/gehGassi.Dto/Walks/WalkCreateDto.cs b/gehGassi.Dto/Walks/WalkCreateDto.cs
index 9cc8ebb..3b19c39 100644
--- a/gehGassi.Dto/Walks/WalkCreateDto.cs
+++ b/gehGassi.Dto/Walks/WalkCreateDto.cs
@@ -105,6 +105,6 @@ namespace gehGassi.Dto.Walks
         /// <summary>
         /// Zahlungsart für den Walk
         /// </summary>
-        public WalkPaymentTypeDto PaymentType { get; set; }
+        public WalkPaymentTypeDto? PaymentType { get; set; }
     }
 }
diff --git a/gehGassi.Web/Controllers/Api/ApiWalksController.cs b/gehGassi.Web/Controllers/Api/ApiWalksController.cs
index 6977608..740ee77 100644
--- a/gehGassi.Web/Controllers/Api/ApiWalksController.cs
+++ b/gehGassi.Web/Controllers/Api/ApiWalksController.cs
@@ -1039,7 +1039,7 @@ namespace gehGassi.Web.Controllers.Api
                             walk.CompletedInfo = string.Empty;
                             walk.Defactation = false;
                             walk.PaymentStatus = PaymentStatus.Pending;
-                            walk.PaymentType = (WalkPaymentType)model.PaymentType;
+                            walk.PaymentType = model.PaymentType != null ? (WalkPaymentType)model.PaymentType : WalkPaymentType.MangoPay;
                             walk.UpdatedAt = DateTimeOffset.UtcNow;
                             walk.Created = DateTimeOffset.UtcNow;
 
@@ -3630,7 +3630,7 @@ namespace gehGassi.Web.Controllers.Api
                         walk.CompletedInfo = string.Empty;
                         walk.Defactation = false;
                         walk.PaymentStatus = PaymentStatus.Pending;
-                        walk.PaymentType = (WalkPaymentType)model.PaymentType;
+                        walk.PaymentType = model.PaymentType != null ? (WalkPaymentType)model.PaymentType : WalkPaymentType.MangoPay;
                         walk.UpdatedAt = DateTimeOffset.UtcNow;
                         walk.Created = DateTimeOffset.UtcNow;
 
@@ -3810,7 +3810,7 @@ namespace gehGassi.Web.Controllers.Api
                         walk.CompletedInfo = string.Empty;
                         walk.Defactation = false;
                         walk.PaymentStatus = PaymentStatus.None;
-                        walk.PaymentType = (WalkPaymentType)model.PaymentType;
+                        walk.PaymentType = model.PaymentType != null ? (WalkPaymentType)model.PaymentType : WalkPaymentType.MangoPay;
                         walk.UpdatedAt = DateTimeOffset.UtcNow;
                         walk.Created = DateTimeOffset.UtcNow;