diff --git a/src/DurableTask.Core/TaskOrchestrationContext.cs b/src/DurableTask.Core/TaskOrchestrationContext.cs
index 02afb9d12..b290b0072 100644
--- a/src/DurableTask.Core/TaskOrchestrationContext.cs
+++ b/src/DurableTask.Core/TaskOrchestrationContext.cs
@@ -33,6 +33,7 @@ internal class TaskOrchestrationContext : OrchestrationContext
         readonly IDictionary<int, OrchestratorAction> orchestratorActionsMap;
         readonly TaskScheduler taskScheduler;
         OrchestrationCompleteOrchestratorAction continueAsNew;
+        bool executionTerminated;
         int idCounter;
 
         public TaskOrchestrationContext(OrchestrationInstance orchestrationInstance, TaskScheduler taskScheduler)
@@ -376,7 +377,11 @@ private void LogDuplicateEvent(string source, HistoryEvent historyEvent, int tas
 
         public void HandleExecutionTerminatedEvent(ExecutionTerminatedEvent terminatedEvent)
         {
-            CompleteOrchestration(terminatedEvent.Input, null, OrchestrationStatus.Terminated);
+            if (!executionTerminated)
+            {
+                executionTerminated = true;
+                CompleteOrchestration(terminatedEvent.Input, null, OrchestrationStatus.Terminated);
+            }
         }
 
         public void CompleteOrchestration(string result)