diff --git a/drivers/arm/css/mhu/css_mhu_doorbell.c b/drivers/arm/css/mhu/css_mhu_doorbell.c
index 8858742..c51f3b1 100644
--- a/drivers/arm/css/mhu/css_mhu_doorbell.c
+++ b/drivers/arm/css/mhu/css_mhu_doorbell.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -20,11 +20,13 @@
 
 void mhuv2_ring_doorbell(struct scmi_channel_plat_info *plat_info)
 {
+	uintptr_t mhuv2_base = plat_info->db_reg_addr & MHU_V2_FRAME_BASE_MASK;
+
 	/* wake receiver */
-	MHU_V2_ACCESS_REQUEST(MHUV2_BASE_ADDR);
+	MHU_V2_ACCESS_REQUEST(mhuv2_base);
 
 	/* wait for receiver to acknowledge its ready */
-	while (MHU_V2_IS_ACCESS_READY(MHUV2_BASE_ADDR) == 0)
+	while (MHU_V2_IS_ACCESS_READY(mhuv2_base) == 0)
 		;
 
 	MHU_RING_DOORBELL(plat_info->db_reg_addr,
@@ -32,7 +34,7 @@
 			plat_info->db_preserve_mask);
 
 	/* clear the access request for the receiver */
-	MHU_V2_CLEAR_REQUEST(MHUV2_BASE_ADDR);
+	MHU_V2_CLEAR_REQUEST(mhuv2_base);
 
 	return;
 }