diff --git a/.cvsignore b/.cvsignore
index 09d9b8b0d..e2972c880 100644
--- a/.cvsignore
+++ b/.cvsignore
@@ -3,6 +3,7 @@ parse.h
 parse.cc
 parse.cc.output
 syn-rules.cc
+syn-rules.cc.output
 lexor.cc
 ivl
 dep