diff --git a/worktree.c b/worktree.c
index b8cf29e6a1..a56a6c2a3d 100644
--- a/worktree.c
+++ b/worktree.c
@@ -581,8 +581,10 @@ static void repair_gitfile(struct worktree *wt,
 	strbuf_release(&dotgit);
 }
 
-static void repair_noop(int iserr, const char *path, const char *msg,
-			void *cb_data)
+static void repair_noop(int iserr UNUSED,
+			const char *path UNUSED,
+			const char *msg UNUSED,
+			void *cb_data UNUSED)
 {
 	/* nothing */
 }