diff --git a/radio/src/CMakeLists.txt b/radio/src/CMakeLists.txt
index 16a0a6584..22dc558be 100644
--- a/radio/src/CMakeLists.txt
+++ b/radio/src/CMakeLists.txt
@@ -654,11 +654,15 @@ else()
   option(HAPTIC "Haptic support" OFF)
   set(TTS "EN" CACHE STRING "TTS language")
   set(LCD "DEFAULT" CACHE STRING "LCD type (DEFAULT/ST7565P/ST7565R/ERC12864FSF/ST7920/KS108)")
+  set(DSM2 "NO" CACHE STRING "LCD type (NO/PPM/SERIAL)")
   set(LUA NO)
   set(PULSES_SRC pulses_avr.cpp)
   set(SRC ${SRC} main_avr.cpp)
   set(FIRMWARE_SRC ${FIRMWARE_SRC} targets/common_avr/adc_driver.cpp)
   add_definitions(-DLCD_${LCD})
+  if(DSM2)
+    add_definitions(-DDSM2 -DDSM2_${DSM2})
+  endif()
   if(SDCARD)
     set(FIRMWARE_SRC ${FIRMWARE_SRC} targets/gruvin9x/diskio.cpp)
   endif()