diff --git a/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef-bl.dat b/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef-bl.dat
index 30099fd875..14bc14f6f9 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef-bl.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef-bl.dat
@@ -86,6 +86,9 @@ PA12 CAN_TX CAN
 define HAL_USE_CAN TRUE
 define STM32_CAN_USE_CAN1 TRUE
 
+# start with a fixed node ID so the board is usable without DNA
+define HAL_CAN_DEFAULT_NODE_ID 117
+
 # make bl baudrate match debug baudrate for easier debugging
 define BOOTLOADER_BAUDRATE 57600
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef.dat
index 8c519ce5e9..c1cca2193e 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef.dat
@@ -93,6 +93,9 @@ PA12 CAN_TX CAN
 define HAL_USE_CAN TRUE
 define STM32_CAN_USE_CAN1 TRUE
 
+# start with a fixed node ID so the board is usable without DNA
+define HAL_CAN_DEFAULT_NODE_ID 117
+
 define HAL_USE_I2C TRUE
 define STM32_I2C_USE_I2C1 TRUE