diff --git a/setup.cfg b/setup.cfg
--- a/setup.cfg
+++ b/setup.cfg
@@ -30,6 +30,7 @@ classifiers =
 [options]
 zip_safe = True
 include_package_data = True
+packages = kaitai/compress
 py_modules = kaitaistruct
 python_requires = >=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*
 install_requires =