diff --git a/libsrc/occ/CMakeLists.txt b/libsrc/occ/CMakeLists.txt
index 9db6271b..ea5a756e 100644
--- a/libsrc/occ/CMakeLists.txt
+++ b/libsrc/occ/CMakeLists.txt
@@ -2,7 +2,7 @@ add_definitions(-DNGINTERFACE_EXPORTS)
 add_library(occ ${NG_LIB_TYPE}
         Partition_Inter2d.cxx Partition_Inter3d.cxx 
         Partition_Loop.cxx Partition_Loop2d.cxx Partition_Loop3d.cxx Partition_Spliter.cxx 
-        occconstruction.cpp occgenmesh.cpp occgeom.cpp occmeshsurf.cpp python_occ.cpp
+        occgenmesh.cpp occgeom.cpp occmeshsurf.cpp python_occ.cpp
         )
 if(USE_GUI)
         add_library(occvis ${NG_LIB_TYPE} vsocc.cpp)