diff --git a/apps/sim/executor/handlers/workflow/workflow-handler.ts b/apps/sim/executor/handlers/workflow/workflow-handler.ts
index 7ee6dec6e..7bd295502 100644
--- a/apps/sim/executor/handlers/workflow/workflow-handler.ts
+++ b/apps/sim/executor/handlers/workflow/workflow-handler.ts
@@ -159,7 +159,7 @@ export class WorkflowBlockHandler implements BlockHandler {
         childTraceSpans = this.captureChildWorkflowLogs(executionResult, childWorkflowName, ctx)
 
         logger.info(`Captured ${childTraceSpans.length} child trace spans from failed execution`)
-      } else if (error.childTraceSpans && Array.isArray(error.childTraceSpans)) {
+      } else if (ChildWorkflowError.isChildWorkflowError(error)) {
         childTraceSpans = error.childTraceSpans
       }