diff --git a/plat/st/stm32mp2/bl2_plat_setup.c b/plat/st/stm32mp2/bl2_plat_setup.c
index 96ac68b..edada72 100644
--- a/plat/st/stm32mp2/bl2_plat_setup.c
+++ b/plat/st/stm32mp2/bl2_plat_setup.c
@@ -179,11 +179,6 @@
 
 	configure_mmu();
 
-	/* Prevent corruption of preloaded Device Tree */
-	mmap_add_dynamic_region(DTB_BASE, DTB_BASE,
-				DTB_LIMIT - DTB_BASE,
-				MT_RO_DATA | MT_SECURE);
-
 	if (dt_open_and_check(STM32MP_DTB_BASE) < 0) {
 		panic();
 	}
@@ -258,7 +253,10 @@
 				FW_CONFIG_ID);
 		fconf_populate("FW_CONFIG", STM32MP_FW_CONFIG_BASE);
 
-		mmap_remove_dynamic_region(DTB_BASE, DTB_LIMIT - DTB_BASE);
+		/*
+		 * After this step, the BL2 device tree area will be overwritten
+		 * with BL31 binary, no other data should be read from BL2 DT.
+		 */
 
 		break;
 
diff --git a/plat/st/stm32mp2/include/platform_def.h b/plat/st/stm32mp2/include/platform_def.h
index 2f7570d..0f22a93 100644
--- a/plat/st/stm32mp2/include/platform_def.h
+++ b/plat/st/stm32mp2/include/platform_def.h
@@ -81,13 +81,6 @@
 #define BL33_BASE			STM32MP_BL33_BASE
 
 /*******************************************************************************
- * DTB specific defines.
- ******************************************************************************/
-#define DTB_BASE			STM32MP_DTB_BASE
-#define DTB_LIMIT			(STM32MP_DTB_BASE + \
-					 STM32MP_DTB_SIZE)
-
-/*******************************************************************************
  * Platform specific page table and MMU setup constants
  ******************************************************************************/
 #define PLAT_PHY_ADDR_SPACE_SIZE	(ULL(1) << 33)