Make pointers explicit in swap functions

1 files changed, 1 insertions, 1 deletions

diff --git a/list.h b/list.h
index cf7e637..f2857f8 100644
--- a/list.h
+++ b/list.h
@@ -51,7 +51,7 @@ ll_insert_after(ll_t * const list, ll_node_t * node, void * const data);
 
 void
 ll_sort(ll_t * list, int (*comp)(void *, void *),
-        void (*swap)(void * a, void *));
+        void (*swap)(void **, void **));
 
 int
 ll_delete(ll_t * const list, ll_node_t * node);