diff --git a/hook.c b/hook.c
index bfc3d1e2b61a6d..2210957287e548 100644
--- a/hook.c
+++ b/hook.c
@@ -186,7 +186,7 @@ int run_hooks_opt(const char *hook_name, struct run_hooks_opt *options)
 		.hook_name = hook_name,
 		.options = options,
 	};
-	const char *const hook_path = find_hook(hook_name);
+	const char *hook_path = find_hook(hook_name);
 	int ret = 0;
 	const struct run_process_parallel_opts opts = {
 		.tr2_category = "hook",
@@ -202,6 +202,18 @@ int run_hooks_opt(const char *hook_name, struct run_hooks_opt *options)
 		.data = &cb_data,
 	};
 
+	/*
+	 * Backwards compatibility hack in VFS for Git: when originally
+	 * introduced (and used!), it was called `post-indexchanged`, but this
+	 * name was changed during the review on the Git mailing list.
+	 *
+	 * Therefore, when the `post-index-change` hook is not found, let's
+	 * look for a hook with the old name (which would be found in case of
+	 * already-existing checkouts).
+	 */
+	if (!hook_path && !strcmp(hook_name, "post-index-change"))
+		hook_path = find_hook("post-indexchanged");
+
 	if (!options)
 		BUG("a struct run_hooks_opt must be provided to run_hooks");
 
diff --git a/t/t7113-post-index-change-hook.sh b/t/t7113-post-index-change-hook.sh
index 58e55a7c779161..455c61a92542ae 100755
--- a/t/t7113-post-index-change-hook.sh
+++ b/t/t7113-post-index-change-hook.sh
@@ -16,6 +16,36 @@ test_expect_success 'setup' '
 	git commit -m "initial"
 '
 
+test_expect_success 'post-indexchanged' '
+	mkdir -p .git/hooks &&
+	test_when_finished "rm -f .git/hooks/post-indexchanged marker" &&
+	write_script .git/hooks/post-indexchanged <<-\EOF &&
+	: >marker
+	EOF
+
+	: make sure -changed is called if -change does not exist &&
+	test_when_finished "echo testing >dir1/file2.txt && git status" &&
+	echo changed >dir1/file2.txt &&
+	: force index to be dirty &&
+	test-tool chmtime -60 .git/index &&
+	git status &&
+	test_path_is_file marker &&
+
+	test_when_finished "rm -f .git/hooks/post-index-change marker2" &&
+	write_script .git/hooks/post-index-change <<-\EOF &&
+	: >marker2
+	EOF
+
+	: make sure -changed is not called if -change exists &&
+	rm -f marker marker2 &&
+	echo testing >dir1/file2.txt &&
+	: force index to be dirty &&
+	test-tool chmtime -60 .git/index &&
+	git status &&
+	test_path_is_missing marker &&
+	test_path_is_file marker2
+'
+
 test_expect_success 'test status, add, commit, others trigger hook without flags set' '
 	test_hook post-index-change <<-\EOF &&
 		if test "$1" -eq 1; then