diff --git a/.gitignore b/.gitignore
index 9588c166..3b36388c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+temp_dirs/undodir/*
 sources_non_forked/ack.vim/.netrwhist
 temp_dirs/yankring_history_v2.txt
 sources_forked/yankring/doc/tags
diff --git a/temp_dirs/undodir/README.md b/temp_dirs/undodir/README.md
new file mode 100644
index 00000000..37f6debe
--- /dev/null
+++ b/temp_dirs/undodir/README.md
@@ -0,0 +1 @@
+Undo dir for VIM