diff --git a/src/modules/uavcan/CMakeLists.txt b/src/modules/uavcan/CMakeLists.txt
index b8c899840a..ce348ec910 100644
--- a/src/modules/uavcan/CMakeLists.txt
+++ b/src/modules/uavcan/CMakeLists.txt
@@ -37,15 +37,12 @@ set(UAVCAN_PLATFORM stm32 CACHE STRING "uavcan platform")
 string(TOUPPER "${OS}" OS_UPPER)
 add_definitions(
 		-DUAVCAN_CPP_VERSION=UAVCAN_CPP03
-		-DUAVCAN_MAX_NETWORK_SIZE_HINT=16
 		-DUAVCAN_MEM_POOL_BLOCK_SIZE=48
 		-DUAVCAN_NO_ASSERTIONS
 		-DUAVCAN_PLATFORM=stm32
 		-DUAVCAN_STM32_${OS_UPPER}=1
 		-DUAVCAN_STM32_NUM_IFACES=2
 		-DUAVCAN_STM32_TIMER_NUMBER=5
-		-DUAVCAN_USE_CPP03=ON
-		-DUAVCAN_USE_EXTERNAL_SNPRINT
 		)
 
 add_subdirectory(libuavcan EXCLUDE_FROM_ALL)