diff --git a/.hgignore b/.hgignore
index a01a178..967699c 100644
--- a/.hgignore
+++ b/.hgignore
@@ -47,7 +47,6 @@
 *.pyd
 *.cover
 *~
-Lib/_sysconfigdata.py
 Lib/lib2to3/*.pickle
 Lib/test/data/*
 Misc/*.wpu