diff --git a/kernel/.gitignore b/kernel/.gitignore
index ab4f1090f437e0aaa0395e110169cdc6d37b50d9..b3097bde4e9cbc999e5d09205db8014e0da27632 100644
--- a/kernel/.gitignore
+++ b/kernel/.gitignore
@@ -4,3 +4,4 @@
 config_data.h
 config_data.gz
 timeconst.h
+hz.bc