diff --git a/src/core/Elsa.Core/Persistence/Specifications/WorkflowInstances/WorkflowIsAlreadyExecutingSpecification.cs b/src/core/Elsa.Core/Persistence/Specifications/WorkflowInstances/WorkflowIsAlreadyExecutingSpecification.cs
index 01333f36a..edf8c026f 100644
--- a/src/core/Elsa.Core/Persistence/Specifications/WorkflowInstances/WorkflowIsAlreadyExecutingSpecification.cs
+++ b/src/core/Elsa.Core/Persistence/Specifications/WorkflowInstances/WorkflowIsAlreadyExecutingSpecification.cs
@@ -6,6 +6,6 @@ namespace Elsa.Persistence.Specifications.WorkflowInstances
 {
     public class WorkflowIsAlreadyExecutingSpecification : Specification<WorkflowInstance>
     {
-        public override Expression<Func<WorkflowInstance, bool>> ToExpression() => x => x.WorkflowStatus == WorkflowStatus.Running || x.WorkflowStatus == WorkflowStatus.Suspended;
+        public override Expression<Func<WorkflowInstance, bool>> ToExpression() => x => x.WorkflowStatus == WorkflowStatus.Running || x.WorkflowStatus == WorkflowStatus.Suspended || x.WorkflowStatus == WorkflowStatus.Idle;
     }
 }
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