diff --git a/radio/src/targets/horus/CMakeLists.txt b/radio/src/targets/horus/CMakeLists.txt
index ffaeadc74..a72074def 100644
--- a/radio/src/targets/horus/CMakeLists.txt
+++ b/radio/src/targets/horus/CMakeLists.txt
@@ -197,5 +197,6 @@ if(INTERNAL_MODULE_PXX1)
 endif()
 
 if(INTERNAL_MODULE_PXX2)
+  set(PXX2 ON)
   add_definitions(-DINTERNAL_MODULE_PXX2)
 endif()
\ No newline at end of file