diff --git a/Engine/lib/CMakeLists.txt b/Engine/lib/CMakeLists.txt
index 687508483..e027d05dd 100644
--- a/Engine/lib/CMakeLists.txt
+++ b/Engine/lib/CMakeLists.txt
@@ -199,7 +199,7 @@ if(TORQUE_SFX_OPENAL)
     advanced_option(TORQUE_OGGVORBIS "Enable OGG Vorbis" ON)
     advanced_option(ALSOFT_EAX "Enable legacy EAX extensions" ${WIN32})
     advanced_option(ALSOFT_UPDATE_BUILD_VERSION "Update git build version info" ON)
-    advanced_option(ALSOFT_BACKEND_COREAUDIO "Enable CoreAudio backend" ON)
+    mark_as_advanced(ALSOFT_BACKEND_COREAUDIO)
     advanced_option(ALSOFT_BACKEND_DSOUND "Enable DirectSound backend" OFF)    
     advanced_option(ALSOFT_BACKEND_JACK "Enable Jack backend" OFF)
     advanced_option(ALSOFT_BACKEND_OBOE "Enable OBOE backend" OFF)