Index: src/arc4random_uniform.m
==================================================================
--- src/arc4random_uniform.m
+++ src/arc4random_uniform.m
@@ -25,11 +25,16 @@
  * cipher called "arcfour" in Tatu Ylonen's ssh package.
  *
  * RC4 is a registered trademark of RSA Laboratories.
  */
 
-#include <stdlib.h>
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
+    defined(__APPLE__)
+# include <stdlib.h>
+#else
+# include <bsd/stdlib.h>
+#endif
 #include <stdint.h>
 
 /*
  * Calculate a uniformly distributed random number less than upper_bound
  * avoiding "modulo bias".