diff --git a/plat/st/stm32mp1/stm32mp1_def.h b/plat/st/stm32mp1/stm32mp1_def.h
index 7e0745a..bd25321 100644
--- a/plat/st/stm32mp1/stm32mp1_def.h
+++ b/plat/st/stm32mp1/stm32mp1_def.h
@@ -182,7 +182,12 @@
  #endif
 #endif
 
+#if STM32MP13
+#define STM32MP_BL33_BASE		STM32MP_DDR_BASE
+#endif
+#if STM32MP15
 #define STM32MP_BL33_BASE		(STM32MP_DDR_BASE + U(0x100000))
+#endif
 #define STM32MP_BL33_MAX_SIZE		U(0x400000)
 
 /* Define maximum page size for NAND devices */