--- wol-0.7.1/lib/realloc.c	2002-03-20 01:45:12.000000000 +0100
+++ wol-0.7.1/lib/realloc.c	2025-02-17 11:35:13.552537462 +0100
@@ -23,9 +23,7 @@
 #undef realloc
 
 #include <sys/types.h>
-
-char *malloc ();
-char *realloc ();
+#include <stdlib.h>
 
 /* Change the size of an allocated block of memory P to N bytes,
    with error checking.  If N is zero, change it to 1.  If P is NULL,