diff --git a/setup.py b/setup.py
index 3d7543ab..bac09236 100644
--- a/setup.py
+++ b/setup.py
@@ -141,6 +141,7 @@ def restore_cencode():
     else:
         link_flags = ['-fPIC', '-lstdc++']
 
+sources.sort()
 sass_extension = Extension(
     '_sass',
     sources,