add _csv build line
diff --git a/Modules/Setup.dist b/Modules/Setup.dist
index 0c7722f..efb783e 100644
--- a/Modules/Setup.dist
+++ b/Modules/Setup.dist
@@ -191,6 +191,9 @@
 # Dynamic readlines
 #xreadlines xreadlinesmodule.c
 
+# CSV file helper
+#_csv _csv.c
+
 # Socket module helper for socket(2)
 #_socket socketmodule.c