diff --git a/ethsock.c b/ethsock.c
index f8fdf23..d086e03 100644
--- a/ethsock.c
+++ b/ethsock.c
@@ -671,6 +671,9 @@ static inline void set_addr(void *p, uint32_t addr)
 	struct sockaddr_in* sin = p;
 	sin->sin_family = AF_INET;
 	sin->sin_addr.s_addr = addr;
+#ifdef NMRPFLASH_BSD
+	((struct sockaddr*)p)->sa_len = sizeof(struct sockaddr_in);
+#endif
 }
 
 #ifndef NMRPFLASH_WINDOWS
@@ -745,12 +748,12 @@ int ethsock_ip_add(struct ethsock *sock, uint32_t ipaddr, uint32_t ipmask, struc
 	}
 #else // NMRPFLASH_OSX (or any other BSD)
 	struct ifaliasreq ifra;
+	memset(&ifra, 0, sizeof(ifra));
 	strncpy(ifra.ifra_name, sock->intf, IFNAMSIZ);
 
 	set_addr(&ifra.ifra_addr, ipaddr);
 	set_addr(&ifra.ifra_mask, ipmask);
 	//set_addr(&ifra.ifra_broadaddr, (ipaddr & ipmask) | ~ipmask);
-	memset(&ifra.ifra_broadaddr, 0, sizeof(ifra.ifra_broadaddr));
 
 	if (ioctl(fd, add ? SIOCAIFADDR : SIOCDIFADDR, &ifra) != 0) {
 		perror(add ? "ioctl(SIOCAIFADDR)" : "ioctl(SIOCDIFADDR)");
diff --git a/nmrpd.h b/nmrpd.h
index af9699a..ce424e3 100644
--- a/nmrpd.h
+++ b/nmrpd.h
@@ -23,14 +23,21 @@
 #include <stdbool.h>
 
 #if defined(_WIN32) || defined(_WIN64)
-#define NMRPFLASH_WINDOWS
-#elif defined(__linux__)
-#define NMRPFLASH_LINUX
-#elif defined(__APPLE__) && defined(__MACH__)
-#define NMRPFLASH_OSX
-#elif defined(__unix__)
-#define NMRPFLASH_UNIX
-#warning "nmrpflash is not fully supported on your operating system"
+#	define NMRPFLASH_WINDOWS
+#else
+#	define NMRPFLASH_UNIX
+#	if defined(__linux__)
+#		define NMRPFLASH_LINUX
+#	elif defined(__APPLE__) && defined(__MACH__)
+#		define NMRPFLASH_OSX
+#		define NMRPFLASH_BSD
+#	elif defined(__unix__)
+#		if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__OpenBSD__)
+#			define NMRPFLASH_BSD
+#		else
+#			warning "nmrpflash is not fully supported on your operating system"
+#		endif
+#	endif
 #endif
 
 #ifndef NMRPFLASH_WINDOWS