diff --git a/plat/st/stm32mp1/stm32mp1_syscfg.c b/plat/st/stm32mp1/stm32mp1_syscfg.c
index 109725c..793ad71 100644
--- a/plat/st/stm32mp1/stm32mp1_syscfg.c
+++ b/plat/st/stm32mp1/stm32mp1_syscfg.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2020, STMicroelectronics - All Rights Reserved
+ * Copyright (c) 2019-2021, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -22,6 +22,7 @@
 #define SYSCFG_ICNR				0x1CU
 #define SYSCFG_CMPCR				0x20U
 #define SYSCFG_CMPENSETR			0x24U
+#define SYSCFG_CMPENCLRR			0x28U
 
 /*
  * SYSCFG_BOOTR Register
@@ -167,8 +168,7 @@
 
 	mmio_write_32(SYSCFG_BASE + SYSCFG_CMPCR, value | SYSCFG_CMPCR_SW_CTRL);
 
-	mmio_clrbits_32(SYSCFG_BASE + SYSCFG_CMPENSETR,
-			SYSCFG_CMPENSETR_MPU_EN);
+	mmio_setbits_32(SYSCFG_BASE + SYSCFG_CMPENCLRR, SYSCFG_CMPENSETR_MPU_EN);
 
 	stm32mp1_clk_disable_non_secure(SYSCFG);
 }