Index: sizes.h
--- sizes.h.orig
+++ sizes.h
@@ -14,7 +14,7 @@
 
 #include <limits.h>
 
-#define rand32() ((unsigned int) rand() | ( (unsigned int) rand() << 16))
+#define rand32() arc4random()
 
 #if (ULONG_MAX == 4294967295UL)
     #define FMT_TARGET "0x%08lx"