diff --git a/.gitignore b/.gitignore
index 10b65f9..3fb11c2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,4 @@ debian/vppcfg.*.debhelper
 debian/.debhelper
 debian/files
 debian/vppcfg.substvars
+.*.~undo-tree~