1 files changed, 1 insertions, 1 deletions
diff --git a/vlist.c b/vlist.c
index b2de7d6..d497c63 100644
--- a/vlist.c
+++ b/vlist.c
@@ -33,7 +33,7 @@ vlist_delete(struct vlist_tree *tree, struct vlist_node *node)
 }
 
 void
-vlist_add(struct vlist_tree *tree, struct vlist_node *node, void *key)
+vlist_add(struct vlist_tree *tree, struct vlist_node *node, const void *key)
 {
 	struct vlist_node *old_node = NULL;
 	struct avl_node *anode;