diff --git a/drivers/mbox/Kconfig b/drivers/mbox/Kconfig
index 6451464dcc1..05874a41a53 100644
--- a/drivers/mbox/Kconfig
+++ b/drivers/mbox/Kconfig
@@ -9,6 +9,12 @@ menuconfig MBOX
 
 if MBOX
 
+config MBOX_INIT_PRIORITY
+	int "MBOX init priority"
+	default KERNEL_INIT_PRIORITY_DEVICE
+	help
+	  MBOX driver device initialization priority.
+
 config MBOX_NRFX_IPC
 	bool "MBOX NRF IPC driver"
 	depends on HAS_HW_NRF_IPC
diff --git a/drivers/mbox/mbox_nrfx_ipc.c b/drivers/mbox/mbox_nrfx_ipc.c
index 0d027889185..9a40196a1b4 100644
--- a/drivers/mbox/mbox_nrfx_ipc.c
+++ b/drivers/mbox/mbox_nrfx_ipc.c
@@ -202,5 +202,5 @@ static const struct mbox_driver_api mbox_nrf_driver_api = {
 };
 
 DEVICE_DT_INST_DEFINE(0, mbox_nrf_init, NULL, &nrfx_mbox_data, &nrfx_mbox_conf,
-		    POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
+		    POST_KERNEL, CONFIG_MBOX_INIT_PRIORITY,
 		    &mbox_nrf_driver_api);