diff --git a/eth/tracers/native/call_flat.go b/eth/tracers/native/call_flat.go
index a51af560d..b1baf0ade 100644
--- a/eth/tracers/native/call_flat.go
+++ b/eth/tracers/native/call_flat.go
@@ -195,6 +195,9 @@ func (t *flatCallTracer) OnExit(depth int, output []byte, gasUsed uint64, err er
 	if t.config.IncludePrecompiles {
 		return
 	}
+	if len(t.tracer.callstack[len(t.tracer.callstack)-1].Calls) == 0 {
+		return
+	}
 	var (
 		// call has been nested in parent
 		parent = t.tracer.callstack[len(t.tracer.callstack)-1]