diff --git a/src/Rebus.Operations/Rebus.Operations.Abstractions/IOperationDispatcher.cs b/src/Rebus.Operations/Rebus.Operations.Abstractions/IOperationDispatcher.cs
index 5393d54..dc56acc 100644
--- a/src/Rebus.Operations/Rebus.Operations.Abstractions/IOperationDispatcher.cs
+++ b/src/Rebus.Operations/Rebus.Operations.Abstractions/IOperationDispatcher.cs
@@ -10,7 +10,7 @@ public interface IOperationDispatcher
     {
         ValueTask<IOperation?> StartNew<T>(object? additionalData = default, IDictionary<string,string>? additionalHeaders = null) where T : class, new();
         ValueTask<IOperation?> StartNew(Type commandType, object? additionalData = default, IDictionary<string,string>? additionalHeaders = null);
-        ValueTask<IOperation?> StartNew(object operationCommand, IDictionary<string,string>? additionalHeaders = null);
-
+        ValueTask<IOperation?> StartNew(object operationCommand,  object? additionalData = default, IDictionary<string,string>? additionalHeaders = null);
+  
     }
 }
\ No newline at end of file
diff --git a/src/Rebus.Operations/Rebus.Operations.Core/DefaultOperationDispatcher.cs b/src/Rebus.Operations/Rebus.Operations.Core/DefaultOperationDispatcher.cs
index f9fd2cb..787d932 100644
--- a/src/Rebus.Operations/Rebus.Operations.Core/DefaultOperationDispatcher.cs
+++ b/src/Rebus.Operations/Rebus.Operations.Core/DefaultOperationDispatcher.cs
@@ -22,7 +22,7 @@ public DefaultOperationDispatcher(
         _operationManager = operationManager;
     }
 
-    protected override async ValueTask<(IOperation, object)> CreateOperation(object command, object? additionalData)
+    protected override async ValueTask<(IOperation, object)> CreateOperation(object command, object? additionalData,IDictionary<string,string>? additionalHeaders)
     {
         return (await _operationManager.GetOrCreateAsync(Guid.NewGuid(), command), command);
     }
diff --git a/src/Rebus.Operations/Rebus.Operations.Core/DefaultOperationTaskDispatcher.cs b/src/Rebus.Operations/Rebus.Operations.Core/DefaultOperationTaskDispatcher.cs
index 9dfd62a..ac74f81 100644
--- a/src/Rebus.Operations/Rebus.Operations.Core/DefaultOperationTaskDispatcher.cs
+++ b/src/Rebus.Operations/Rebus.Operations.Core/DefaultOperationTaskDispatcher.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 using Dbosoft.Rebus.Operations.Workflow;
 using Microsoft.Extensions.Logging;
@@ -22,7 +23,8 @@ public DefaultOperationTaskDispatcher(
         _operationTaskManager = operationTaskManager;
     }
 
-    protected override async ValueTask<(IOperationTask, object)> CreateTask(Guid operationId, Guid initiatingTaskId, object command, object? additionalData)
+    protected override async ValueTask<(IOperationTask, object)> CreateTask(Guid operationId, Guid initiatingTaskId, 
+        object command, object? additionalData, IDictionary<string,string>? additionalHeaders)
     {
         var op = await _operationManager.GetByIdAsync(operationId);
         if (op == null)
diff --git a/src/Rebus.Operations/Rebus.Operations.Core/OperationDispatcherBase.cs b/src/Rebus.Operations/Rebus.Operations.Core/OperationDispatcherBase.cs
index b930f33..3d090d1 100644
--- a/src/Rebus.Operations/Rebus.Operations.Core/OperationDispatcherBase.cs
+++ b/src/Rebus.Operations/Rebus.Operations.Core/OperationDispatcherBase.cs
@@ -7,7 +7,6 @@
 using System.Text.Json;
 using System.Threading.Tasks;
 using Dbosoft.Rebus.Operations.Commands;
-using Dbosoft.Rebus.Operations.Workflow;
 using Microsoft.Extensions.Logging;
 using Rebus.Bus;
 
@@ -27,9 +26,9 @@ protected OperationDispatcherBase(IBus bus, WorkflowOptions options, ILogger<Ope
             _logger = logger;
         }
 
-        public ValueTask<IOperation?> StartNew(object command, IDictionary<string,string>? additionalHeaders = null)
+        public ValueTask<IOperation?> StartNew(object command, object? additionalData = default, IDictionary<string,string>? additionalHeaders = null)
         {
-            return StartOperation(command, null, additionalHeaders);
+            return StartOperation(command, additionalData, additionalHeaders);
         }
 
         public ValueTask<IOperation?> StartNew<T>(object? additionalData = default, IDictionary<string,string>? additionalHeaders = null)
@@ -44,14 +43,14 @@ protected OperationDispatcherBase(IBus bus, WorkflowOptions options, ILogger<Ope
             return StartOperation(commandType,additionalData, additionalHeaders);
         }
 
-        protected abstract ValueTask<(IOperation, object)> CreateOperation(object command, object? additionalData);
+        protected abstract ValueTask<(IOperation, object)> CreateOperation(object command, object? additionalData, IDictionary<string,string>? additionalHeaders);
 
         protected async ValueTask<IOperation?> StartOperation(object command, object? additionalData, IDictionary<string,string>? additionalHeaders = null)
         {
             if (command == null)
                 throw new ArgumentNullException(nameof(command));
 
-            var(operation, taskCommand) = await CreateOperation(command, additionalData);
+            var(operation, taskCommand) = await CreateOperation(command, additionalData, additionalHeaders);
             
             var commandJson = JsonSerializer.Serialize(taskCommand);
 
diff --git a/src/Rebus.Operations/Rebus.Operations.Core/OperationTaskDispatcherBase.cs b/src/Rebus.Operations/Rebus.Operations.Core/OperationTaskDispatcherBase.cs
index 3b4f3fe..08b2a0b 100644
--- a/src/Rebus.Operations/Rebus.Operations.Core/OperationTaskDispatcherBase.cs
+++ b/src/Rebus.Operations/Rebus.Operations.Core/OperationTaskDispatcherBase.cs
@@ -43,7 +43,7 @@ protected OperationTaskDispatcherBase(IBus bus, WorkflowOptions options, ILogger
         return StartTask(operationId, initiatingTaskId, commandType, additionalData, additionalHeaders);
     }
 
-    protected abstract ValueTask<(IOperationTask, object)> CreateTask(Guid operationId, Guid initiatingTaskId, object command, object? additionalData);
+    protected abstract ValueTask<(IOperationTask, object)> CreateTask(Guid operationId, Guid initiatingTaskId, object command, object? additionalData, IDictionary<string,string>? additionalHeaders);
 
     protected async ValueTask<IOperationTask?> StartTask(Guid operationId, Guid initiatingTaskId, 
         object command, object? additionalData, IDictionary<string,string>? additionalHeaders = null)
@@ -51,7 +51,7 @@ protected OperationTaskDispatcherBase(IBus bus, WorkflowOptions options, ILogger
         if (command == null)
             throw new ArgumentNullException(nameof(command));
 
-        var (task, taskCommand) = await CreateTask(operationId, initiatingTaskId, command, additionalData);
+        var (task, taskCommand) = await CreateTask(operationId, initiatingTaskId, command, additionalData, additionalHeaders);
         var commandJson = JsonSerializer.Serialize(taskCommand);
 
         var taskMessage = new CreateNewOperationTaskCommand(
diff --git a/test/Rebus.Operations.Tests/ExposingHeadersCommandHandler.cs b/test/Rebus.Operations.Tests/ExposingHeadersCommandHandler.cs
index 6e6349c..a556b5a 100644
--- a/test/Rebus.Operations.Tests/ExposingHeadersCommandHandler.cs
+++ b/test/Rebus.Operations.Tests/ExposingHeadersCommandHandler.cs
@@ -13,7 +13,7 @@ public ExposingHeadersCommandHandler(ITaskMessaging messaging)
     }
 
     public static bool Called { get; set; }
-    public static IDictionary<string, string> Headers;
+    public static IDictionary<string, string>? Headers;
 
     public Task Handle(OperationTask<TestCommand> message)
     {