diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index c7069e4f..da3db3aa 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -1,4 +1,4 @@
-install(FILES __init__.py meshing.py csg.py geom2d.py
+install(FILES __init__.py meshing.py csg.py geom2d.py stl.py
         DESTINATION ${PYTHON_PACKAGES_INSTALL_DIR}/netgen
         COMPONENT netgen
         )