diff --git a/UI/CMakeLists.txt b/UI/CMakeLists.txt
index d02cec2d..ce8a1943 100644
--- a/UI/CMakeLists.txt
+++ b/UI/CMakeLists.txt
@@ -49,6 +49,8 @@ endfunction()
 # Select UI Framework
 if (ENABLE_QT)
    add_subdirectory(Qt)
+elseif (ENABLE_QUARTZ)
+   add_subdirectory(quartz)
 elseif (APPLE)
    add_subdirectory(AppKit)
 elseif(ANDROID)