diff --git a/src/drivers/boards/px4fmu-v1/board_config.h b/src/drivers/boards/px4fmu-v1/board_config.h
index 6f71662846..02c26b5c0b 100644
--- a/src/drivers/boards/px4fmu-v1/board_config.h
+++ b/src/drivers/boards/px4fmu-v1/board_config.h
@@ -60,6 +60,7 @@ __BEGIN_DECLS
 
 /* PX4IO connection configuration */
 #define PX4IO_SERIAL_DEVICE	"/dev/ttyS2"
+#define UDID_START		0x1FFF7A10
 
 //#ifdef CONFIG_STM32_SPI2
 //#  error "SPI2 is not supported on this board"
diff --git a/src/drivers/boards/px4fmu-v2/board_config.h b/src/drivers/boards/px4fmu-v2/board_config.h
index a19ed9d247..4972e69147 100644
--- a/src/drivers/boards/px4fmu-v2/board_config.h
+++ b/src/drivers/boards/px4fmu-v2/board_config.h
@@ -52,6 +52,8 @@ __BEGIN_DECLS
 /* these headers are not C++ safe */
 #include <stm32.h>
 #include <arch/board/board.h>
+
+#define UDID_START		0x1FFF7A10
  
 /****************************************************************************************************
  * Definitions