#include "builtin.h"
 #include "utf8.h"
 
-static const char commit_tree_usage[] = "git commit-tree <sha1> [-p <sha1>]* < changelog";
+static const char commit_tree_usage[] = "git commit-tree <sha1> [(-p <sha1>)...] < changelog";
 
 static void new_parent(struct commit *parent, struct commit_list **parents_p)
 {