diff --git a/libuavcan_drivers/stm32/driver/include/uavcan_stm32/build_config.hpp b/libuavcan_drivers/stm32/driver/include/uavcan_stm32/build_config.hpp
index 3eba3ba6bf..b3bf403594 100644
--- a/libuavcan_drivers/stm32/driver/include/uavcan_stm32/build_config.hpp
+++ b/libuavcan_drivers/stm32/driver/include/uavcan_stm32/build_config.hpp
@@ -15,6 +15,10 @@
 # define UAVCAN_STM32_NUTTX 0
 #endif
 
+#ifndef UAVCAN_STM32_BAREMETAL
+# define UAVCAN_STM32_BAREMETAL 0
+#endif
+
 /**
  * Number of interfaces must be enabled explicitly
  */