diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6cd58644..78b4187f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -102,7 +102,6 @@ add_library(lego1 SHARED
   LEGO1/mxcontrolpresenter.cpp
   LEGO1/mxcore.cpp
   LEGO1/mxcriticalsection.cpp
-  LEGO1/mxdirect3d.cpp
   LEGO1/mxdirectdraw.cpp
   LEGO1/mxdirect3d.cpp
   LEGO1/mxdiskstreamcontroller.cpp