diff --git a/builtin/worktree.c b/builtin/worktree.c
index c4abbde2b8..5e84026177 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -245,7 +245,7 @@ static void validate_worktree_add(const char *path, const struct add_opts *opts)
 	if (!wt)
 		goto done;
 
-	locked = !!is_worktree_locked(wt);
+	locked = !!worktree_lock_reason(wt);
 	if ((!locked && opts->force) || (locked && opts->force > 1)) {
 		if (delete_git_dir(wt->id))
 		    die(_("unable to re-add worktree '%s'"), path);
@@ -682,7 +682,7 @@ static int lock_worktree(int ac, const char **av, const char *prefix)
 	if (is_main_worktree(wt))
 		die(_("The main working tree cannot be locked or unlocked"));
 
-	old_reason = is_worktree_locked(wt);
+	old_reason = worktree_lock_reason(wt);
 	if (old_reason) {
 		if (*old_reason)
 			die(_("'%s' is already locked, reason: %s"),
@@ -714,7 +714,7 @@ static int unlock_worktree(int ac, const char **av, const char *prefix)
 		die(_("'%s' is not a working tree"), av[0]);
 	if (is_main_worktree(wt))
 		die(_("The main working tree cannot be locked or unlocked"));
-	if (!is_worktree_locked(wt))
+	if (!worktree_lock_reason(wt))
 		die(_("'%s' is not locked"), av[0]);
 	ret = unlink_or_warn(git_common_path("worktrees/%s/locked", wt->id));
 	free_worktrees(worktrees);
@@ -787,7 +787,7 @@ static int move_worktree(int ac, const char **av, const char *prefix)
 	validate_no_submodules(wt);
 
 	if (force < 2)
-		reason = is_worktree_locked(wt);
+		reason = worktree_lock_reason(wt);
 	if (reason) {
 		if (*reason)
 			die(_("cannot move a locked working tree, lock reason: %s\nuse 'move -f -f' to override or unlock first"),
@@ -900,7 +900,7 @@ static int remove_worktree(int ac, const char **av, const char *prefix)
 	if (is_main_worktree(wt))
 		die(_("'%s' is a main working tree"), av[0]);
 	if (force < 2)
-		reason = is_worktree_locked(wt);
+		reason = worktree_lock_reason(wt);
 	if (reason) {
 		if (*reason)
 			die(_("cannot remove a locked working tree, lock reason: %s\nuse 'remove -f -f' to override or unlock first"),
diff --git a/worktree.c b/worktree.c
index b0d0b5426d..befdbe7fae 100644
--- a/worktree.c
+++ b/worktree.c
@@ -235,7 +235,7 @@ int is_main_worktree(const struct worktree *wt)
 	return !wt->id;
 }
 
-const char *is_worktree_locked(struct worktree *wt)
+const char *worktree_lock_reason(struct worktree *wt)
 {
 	assert(!is_main_worktree(wt));
 
diff --git a/worktree.h b/worktree.h
index 6b12a3cf67..55d449b6a9 100644
--- a/worktree.h
+++ b/worktree.h
@@ -10,7 +10,7 @@ struct worktree {
 	char *path;
 	char *id;
 	char *head_ref;		/* NULL if HEAD is broken or detached */
-	char *lock_reason;	/* private - use is_worktree_locked */
+	char *lock_reason;	/* private - use worktree_lock_reason */
 	struct object_id head_oid;
 	int is_detached;
 	int is_bare;
@@ -60,7 +60,7 @@ extern int is_main_worktree(const struct worktree *wt);
  * Return the reason string if the given worktree is locked or NULL
  * otherwise.
  */
-extern const char *is_worktree_locked(struct worktree *wt);
+extern const char *worktree_lock_reason(struct worktree *wt);
 
 #define WT_VALIDATE_WORKTREE_MISSING_OK (1 << 0)