diff --git a/doc/forum/How_can_I_determine_why_a_given_file_is___34__used__34____63__/comment_3_7cc944d96f4620e98fe22a554684ad22._comment b/doc/forum/How_can_I_determine_why_a_given_file_is___34__used__34____63__/comment_3_7cc944d96f4620e98fe22a554684ad22._comment
new file mode 100644
index 0000000000..8c35fe084e
--- /dev/null
+++ b/doc/forum/How_can_I_determine_why_a_given_file_is___34__used__34____63__/comment_3_7cc944d96f4620e98fe22a554684ad22._comment
@@ -0,0 +1,12 @@
+[[!comment format=mdwn
+ username="erics"
+ avatar="http://cdn.libravatar.org/avatar/6e5f74c742128e5d98fd672ed6ea4865"
+ subject="D'oh!"
+ date="2021-05-10T21:26:25Z"
+ content="""
+\"Is it in use in git's index?\"
+
+That was it; after *git reset*, the file is now again reported as unused.
+
+Thanks, and sorry for the noise.
+"""]]