diff --git a/CMakeLists.txt b/CMakeLists.txt
index b16da25..93372bf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -673,7 +673,6 @@ if(APPLE)
 
 	set(src_sys_core
 		sys/glimp.cpp
-		sys/glimp_ati_fragment_shader.cpp
 		sys/osx/DOOMController.mm
 		sys/osx/macosx_misc.mm
 		sys/osx/SDLMain.m