diff --git a/Fika.Core/Coop/ClientClasses/CoopClientInventoryController.cs b/Fika.Core/Coop/ClientClasses/CoopClientInventoryController.cs
index 820480e1..d2c7a663 100644
--- a/Fika.Core/Coop/ClientClasses/CoopClientInventoryController.cs
+++ b/Fika.Core/Coop/ClientClasses/CoopClientInventoryController.cs
@@ -253,7 +253,7 @@ private void HandleFinalResult(IResult result)
 						InventoryController.logger.LogError($"{InventoryController.ID} - Operation critical failure - status mismatch: {Operation.Id} server status: {serverStatus} client status: {localStatus} - {Operation}");
 					}
 				}
-				Callback(OperationResult);
+				Callback?.Invoke(OperationResult);
 			}
 		}