diff --git a/addrs_ioctl.c b/addrs_ioctl.c
index ff1a06a..3d58d0d 100644
--- a/addrs_ioctl.c
+++ b/addrs_ioctl.c
@@ -18,7 +18,7 @@
 #include <net/if.h>
 #include <netinet/in.h>
 
-#if defined __FreeBSD__ || defined __OpenBSD__
+#if defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
 #include <sys/param.h>
 #include <sys/sysctl.h>
 #include <net/if_dl.h>
@@ -71,10 +71,10 @@ get_addrs_ioctl(char *interface, char if_hw_addr[], struct in_addr *if_ip_addr)
     got_hw_addr = 1;
   }
 #else
-#if defined __FreeBSD__ || defined __OpenBSD__
+#if defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
   {
     int sysctlparam[6] = {CTL_NET, PF_ROUTE, 0, 0, NET_RT_IFLIST, 0};
-    int needed = 0;
+    size_t needed = 0;
     char *buf = NULL;
     struct if_msghdr *msghdr = NULL;
     sysctlparam[5] = if_nametoindex(interface);