diff --git a/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c b/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
index 049192880..57c404675 100644
--- a/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
+++ b/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
@@ -58,7 +58,8 @@ static const struct imx_rdc_cfg rdc[] = {
 	RDC_MDAn(RDC_MDA_M4, DID1),
 
 	/* peripherals domain permission */
-	RDC_PDAPn(RDC_PDAP_UART4, D1R | D1W),
+	/*RDC_PDAPn(RDC_PDAP_UART4, D1R | D1W),*/
+	RDC_PDAPn(RDC_PDAP_UART4, D0R | D0W),
 	RDC_PDAPn(RDC_PDAP_UART2, D0R | D0W),
 
 	/* memory region */