diff -r 2e74828c5e94 -r 98dc2d3a9b1d test/avl_tests.c
--- a/test/avl_tests.c	Sat Jul 15 19:20:06 2017 +0200
+++ b/test/avl_tests.c	Sat Jul 15 20:46:18 2017 +0200
@@ -224,7 +224,7 @@
     ucx_avl_free(tree4);
 }
 
-static intmax_t dist_int(void* a, void* b, void* n) {
+static intmax_t dist_int(const void* a, const void* b, void* n) {
     return ((intmax_t)a)-((intmax_t)b);
 }