diff --git a/setup.py b/setup.py
index 61b857368..c07116917 100644
--- a/setup.py
+++ b/setup.py
@@ -25,6 +25,7 @@
     Extension(
         name="counting_tree",
         sources=["opteryx/sketches/counting_tree.pyx"],
+    ),
 ]
 
 setup(