diff --git a/.cvsignore b/.cvsignore
index daba8c98..e5ac4e04 100644
--- a/.cvsignore
+++ b/.cvsignore
@@ -1,8 +1,10 @@
+*_.c
 .deps
 ChangeLog
 Makefile
 Makefile.in
 aclocal.m4
+ansi2knr
 bison
 bison.aux
 bison.cp