diff --git a/ares/.cvsignore b/ares/.cvsignore
index 8230d956c9..cd6e29bbd3 100644
--- a/ares/.cvsignore
+++ b/ares/.cvsignore
@@ -5,3 +5,4 @@ adig
 ahost
 config.log
 config.status
+aclocal.m4