diff --git a/drivers/mailbox/stm32-ipcc.c b/drivers/mailbox/stm32-ipcc.c
index 81a4115..093b570 100644
--- a/drivers/mailbox/stm32-ipcc.c
+++ b/drivers/mailbox/stm32-ipcc.c
@@ -163,6 +163,6 @@
 	.id = UCLASS_MAILBOX,
 	.of_match = stm32_ipcc_ids,
 	.probe = stm32_ipcc_probe,
-	.priv_auto_alloc_size = sizeof(struct stm32_ipcc),
+	.priv_auto	= sizeof(struct stm32_ipcc),
 	.ops = &stm32_ipcc_mbox_ops,
 };