--- src/port.h.orig	Sun Aug 11 22:56:24 2013
+++ src/port.h	Sun Aug 11 23:00:53 2013
@@ -246,7 +246,11 @@ extern char *sys_errlist[];
  * not agree with RAND_MAX.  We must not link with -lucb.
  */
 
-#ifdef HAVE_srandom
+#if defined(HAVE_arc4random) && defined(HAVE_arc4random_uniform)
+# define RAND()         arc4random()
+# define SRAND(seed)    /* empty */
+# define RRAND(lo,hi)   (arc4random_uniform((hi)-(lo)) + (lo))
+#elif defined(HAVE_srandom)
 # include <math.h>
 # define RAND()         (int)random()
 # define SRAND(seed)    srandom(seed)
@@ -262,7 +266,7 @@ extern char *sys_errlist[];
 #   define RRAND(lo,hi)  (RAND() % ((hi)-(lo)+1) + (lo))
 #  endif
 # else
-   error "Don't have srand() or srandom()."
+#  error "Don't have srand() or srandom()."
 # endif
 #endif