/* See LICENSE file for copyright and license details. */
 #if defined(__linux__)
-       #include <stdio.h>
        #include <stdint.h>
+       #include <stdio.h>
 
        #include "../util.h"
 
        const char *
        entropy(void)
        {
-               uint64_t num;
+               uintmax_t num;
 
-               if (pscanf("/proc/sys/kernel/random/entropy_avail",
-                          "%d", &num) != 1) {
+               if (pscanf("/proc/sys/kernel/random/entropy_avail", "%ju", &num)
+                   != 1) {
                        return NULL;
                }
 
-               return bprintf("%d", num);
+               return bprintf("%ju", num);
        }
-#elif defined(__OpenBSD__)
+#elif defined(__OpenBSD__) | defined(__FreeBSD__)
        const char *
        entropy(void)
        {