diff --git a/setup.py b/setup.py
index 44c19af..597ee98 100644
--- a/setup.py
+++ b/setup.py
@@ -35,8 +35,8 @@ if py2exe != None:
 # _composite.c extension
 #
 
-setup_kwargs['ext_modules'].append(Extension('_composite', ['_composite.c'], include_dirs=['.'], extra_link_args=["/MANIFEST"] if platform.system() == "Windows" else []))
-setup_kwargs['ext_modules'].append(Extension('_iterate', ['iterate.c'], include_dirs=['.'], extra_link_args=["/MANIFEST"] if platform.system() == "Windows" else []))
+setup_kwargs['ext_modules'].append(Extension('_composite', ['src/composite.c'], include_dirs=['.'], extra_link_args=["/MANIFEST"] if platform.system() == "Windows" else []))
+setup_kwargs['ext_modules'].append(Extension('_iterate', ['src/iterate.c'], include_dirs=['.'], extra_link_args=["/MANIFEST"] if platform.system() == "Windows" else []))
 # tell build_ext to build the extension in-place
 # (NOT in build/)
 setup_kwargs['options']['build_ext'] = {'inplace' : 1}
diff --git a/_composite.c b/src/composite.c
similarity index 100%
rename from _composite.c
rename to src/composite.c
diff --git a/iterate.c b/src/iterate.c
similarity index 100%
rename from iterate.c
rename to src/iterate.c