diff --git a/doc/git-annex-unlock.mdwn b/doc/git-annex-unlock.mdwn
index b410c880bf..9b5051fb55 100644
--- a/doc/git-annex-unlock.mdwn
+++ b/doc/git-annex-unlock.mdwn
@@ -39,6 +39,7 @@ repository. So, enable annex.thin with care.
 
 	# git annex unlock photo.jpg
 	# gimp photo.jpg
+	# git annex add photo.jpg
 	# git annex lock photo.jpg
 	# git commit -m "redeye removal"
 
diff --git a/doc/git-annex-unlock/comment_6_7ab5b674d0fc18da262e6c0264953e21._comment b/doc/git-annex-unlock/comment_6_7ab5b674d0fc18da262e6c0264953e21._comment
new file mode 100644
index 0000000000..ec3e10f15c
--- /dev/null
+++ b/doc/git-annex-unlock/comment_6_7ab5b674d0fc18da262e6c0264953e21._comment
@@ -0,0 +1,9 @@
+[[!comment format=mdwn
+ username="joey"
+ subject="""re: issue with example"""
+ date="2021-03-01T17:07:06Z"
+ content="""
+`git-annex lock` wouldn't erase any modifications, but it would fail
+due to the file being modified. Fixed the example to use `git-annex add`
+before locking.
+"""]]