diff --git a/plat/st/stm32mp1/stm32mp1_def.h b/plat/st/stm32mp1/stm32mp1_def.h
index bd25321..8ca6123 100644
--- a/plat/st/stm32mp1/stm32mp1_def.h
+++ b/plat/st/stm32mp1/stm32mp1_def.h
@@ -252,8 +252,14 @@
 /*******************************************************************************
  * STM32MP1 UART
  ******************************************************************************/
+#if STM32MP13
+#define USART1_BASE			U(0x4C000000)
+#define USART2_BASE			U(0x4C001000)
+#endif
+#if STM32MP15
 #define USART1_BASE			U(0x5C000000)
 #define USART2_BASE			U(0x4000E000)
+#endif
 #define USART3_BASE			U(0x4000F000)
 #define UART4_BASE			U(0x40010000)
 #define UART5_BASE			U(0x40011000)