-static void setup(u_char *, u_char *, size_t, size_t, int (*)());
-static void insertionsort(u_char *, size_t, size_t, int (*)());
+static void setup(u_char *, u_char *, size_t, size_t,
+ int (*)(const void *, const void *));
+static void insertionsort(u_char *, size_t, size_t,
+ int (*)(const void *, const void *));