diff --git a/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_MTS_MDOT_F411RE/system_stm32f4xx.c b/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_MTS_MDOT_F411RE/system_stm32f4xx.c
index 71197ae02e..036582380a 100644
--- a/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_MTS_MDOT_F411RE/system_stm32f4xx.c
+++ b/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_MTS_MDOT_F411RE/system_stm32f4xx.c
@@ -125,8 +125,10 @@
 /*!< Uncomment the following line if you need to relocate your vector Table in
      Internal SRAM. */
 /* #define VECT_TAB_SRAM */
+#ifndef VECT_TAB_OFFSET
 #define VECT_TAB_OFFSET  0x00 /*!< Vector Table base offset field. 
                                    This value must be a multiple of 0x200. */
+#endif
 /******************************************************************************/
 
 /**