diff --git a/1991/ant/.gitignore b/1991/ant/.gitignore
index 400545b7e..b54424400 100644
--- a/1991/ant/.gitignore
+++ b/1991/ant/.gitignore
@@ -1,4 +1,5 @@
 ant
+ant.alt
 ant.orig
 hill
 mole