diff --git a/internal/bbsimctl/commands/onu.go b/internal/bbsimctl/commands/onu.go
index 6422f0a..2e8f887 100644
--- a/internal/bbsimctl/commands/onu.go
+++ b/internal/bbsimctl/commands/onu.go
@@ -42,7 +42,7 @@
 	conn, err := grpc.Dial(config.GlobalConfig.Server, grpc.WithInsecure())
 
 	if err != nil {
-		log.Fatal("did not connect: %v", err)
+		log.Fatalf("did not connect: %v", err)
 		return nil
 	}
 	defer conn.Close()
@@ -54,7 +54,7 @@
 	defer cancel()
 	onus, err := c.GetONUs(ctx, &pb.Empty{})
 	if err != nil {
-		log.Fatal("could not get OLT: %v", err)
+		log.Fatalf("could not get OLT: %v", err)
 		return nil
 	}
 	return onus