diff --git a/lib/atexit/atexit.go b/lib/atexit/atexit.go
index 8e44769d3..3f0bfa49a 100644
--- a/lib/atexit/atexit.go
+++ b/lib/atexit/atexit.go
@@ -29,7 +29,7 @@ func Register(fn func()) {
 		signal.Notify(exitChan, os.Interrupt) // syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT
 		go func() {
 			sig, closed := <-exitChan
-			if closed {
+			if closed || sig == nil {
 				return
 			}
 			fs.Infof(nil, "Signal received: %s", sig)