diff --git a/.cvsignore b/.cvsignore
index 33d92999..bd71f1e3 100644
--- a/.cvsignore
+++ b/.cvsignore
@@ -14,6 +14,7 @@ bison.info-[0-9]*
 bison.ky
 bison.log
 bison.pg
+bison.ps
 bison.simple
 bison.toc
 bison.tp