diff --git a/radio/src/targets/common/arm/stm32/f2/CMakeLists.txt b/radio/src/targets/common/arm/stm32/f2/CMakeLists.txt
index 2d417f56a..53f0c458b 100644
--- a/radio/src/targets/common/arm/stm32/f2/CMakeLists.txt
+++ b/radio/src/targets/common/arm/stm32/f2/CMakeLists.txt
@@ -9,6 +9,7 @@ add_library(stm32cube_ll OBJECT
   ${STM32CUBE_DIR}/Src/stm32f2xx_ll_gpio.c
   ${STM32CUBE_DIR}/Src/stm32f2xx_ll_tim.c
   ${STM32CUBE_DIR}/Src/stm32f2xx_ll_dma.c
+  ${STM32CUBE_DIR}/Src/stm32f2xx_ll_usart.c
   )
 
 target_compile_options(stm32cube_ll PRIVATE -DUSE_FULL_LL_DRIVER)