diff --git a/git/gitconfig b/git/gitconfig
index bae5e42..28943ac 100644
--- a/git/gitconfig
+++ b/git/gitconfig
@@ -1,4 +1,4 @@
-# set your user tokens as enivornment variables, such as ~/.secrets
+# set your user tokens as environment variables, such as ~/.secrets
 # See the README for examples.
 [color]
   ui = true
diff --git a/vimrc b/vimrc
index 489daa4..196cf7c 100644
--- a/vimrc
+++ b/vimrc
@@ -49,10 +49,11 @@ set nowb
 " ================ Persistent Undo ==================
 " Keep undo history across sessions, by storing in file.
 " Only works all the time.
-
-silent !mkdir ~/.vim/backups > /dev/null 2>&1
-set undodir=~/.vim/backups
-set undofile
+if has('persistent_undo')
+  silent !mkdir ~/.vim/backups > /dev/null 2>&1
+  set undodir=~/.vim/backups
+  set undofile
+endif
 
 " ================ Indentation ======================