diff --git a/drivers/thunderbolt/ctl.c b/drivers/thunderbolt/ctl.c
index d04fee4acb2edd9c2ef858c26fce26f074109b0b..4c6da92edcb4fb2e7a28c69bbd67211e859884cb 100644
--- a/drivers/thunderbolt/ctl.c
+++ b/drivers/thunderbolt/ctl.c
@@ -305,13 +305,13 @@ static struct ctl_pkg *tb_ctl_pkg_alloc(struct tb_ctl *ctl)
 {
 	struct ctl_pkg *pkg = kzalloc(sizeof(*pkg), GFP_KERNEL);
 	if (!pkg)
-		return 0;
+		return NULL;
 	pkg->ctl = ctl;
 	pkg->buffer = dma_pool_alloc(ctl->frame_pool, GFP_KERNEL,
 				     &pkg->frame.buffer_phy);
 	if (!pkg->buffer) {
 		kfree(pkg);
-		return 0;
+		return NULL;
 	}
 	return pkg;
 }