diff --git a/cmd/containerd-shim-runc-v2/task/service.go b/cmd/containerd-shim-runc-v2/task/service.go
index b6455f285..1a1a960ff 100644
--- a/cmd/containerd-shim-runc-v2/task/service.go
+++ b/cmd/containerd-shim-runc-v2/task/service.go
@@ -707,7 +707,6 @@ func (s *service) send(evt interface{}) {
 	s.events <- evt
 }
 
-// s.mu must be locked when calling handleProcessExit
 func (s *service) handleProcessExit(e runcC.Exit, c *runc.Container, p process.Process) {
 	if ip, ok := p.(*process.Init); ok {
 		// Ensure all children are killed