diff --git a/radio/src/targets/horus/CMakeLists.txt b/radio/src/targets/horus/CMakeLists.txt
index 2a7f14ec5..6f64dae51 100644
--- a/radio/src/targets/horus/CMakeLists.txt
+++ b/radio/src/targets/horus/CMakeLists.txt
@@ -21,6 +21,7 @@ set(RTC_BACKUP_RAM YES)
 set(PPM_LIMITS_SYMETRICAL YES)
 set(USB_SERIAL ON CACHE BOOL "Enable USB serial (CDC)")
 set(ROTARY_ENCODER YES)
+set(EXTERNAL_MODULE YES)
 
 # for size report script
 set(CPU_TYPE_FULL STM32F429xI)
@@ -173,6 +174,10 @@ if(INTERNAL_MODULE_MULTI)
   add_definitions(-DINTERNAL_MODULE_MULTI)
 endif()
 
+if(EXTERNAL_MODULE)
+  add_definitions(-DHARDWARE_EXTERNAL_MODULE)
+endif()
+
 include_directories(${RADIO_SRC_DIRECTORY}/fonts/480x272 gui/${GUI_DIR} gui/${GUI_DIR}/layouts)
 
 file(GLOB THEMES_SRC RELATIVE ${RADIO_SRC_DIRECTORY}/gui/480x272 ${RADIO_SRC_DIRECTORY}/gui/480x272/themes/*.cpp)