diff --git a/.gitignore b/.gitignore
index fc6242c2..3e729de4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -84,3 +84,4 @@ testfail
 
 # Internal design/dev notes — not for publication
 /development/
+decnet.tar
diff --git a/decnet.tar b/decnet.tar
deleted file mode 100644
index 02de619a..00000000
Binary files a/decnet.tar and /dev/null differ