diff --git a/revision.h b/revision.h
index 1b58aacc03..01d2d3e33d 100644
--- a/revision.h
+++ b/revision.h
@@ -256,8 +256,6 @@ extern void put_revision_mark(const struct rev_info *revs,
 extern void mark_parents_uninteresting(struct commit *commit);
 extern void mark_tree_uninteresting(struct tree *tree);
 
-char *path_name(struct strbuf *path, const char *name);
-
 extern void show_object_with_name(FILE *, struct object *, const char *);
 
 extern void add_pending_object(struct rev_info *revs,