diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index e88f544a1548..df8a785be324 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -886,7 +886,6 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx8ulp = {
 	.rx	= imx_mu_generic_rx,
 	.rxdb	= imx_mu_generic_rxdb,
 	.init	= imx_mu_init_generic,
-	.rxdb	= imx_mu_generic_rxdb,
 	.type	= IMX_MU_V2,
 	.xTR	= 0x200,
 	.xRR	= 0x280,