diff --git a/main.go b/main.go
index 80bf075c6..585e2bcce 100644
--- a/main.go
+++ b/main.go
@@ -22,5 +22,8 @@ func main() {
 		os.Exit(1)
 	}
 
-	(<-printUpdateMessage)()
+	printFunc := <-printUpdateMessage
+	if printFunc != nil {
+		printFunc()
+	}
 }