diff --git a/src/os/include/os/os_socket.h b/src/os/include/os/os_socket.h
index 6f168b4..bc344a3 100644
--- a/src/os/include/os/os_socket.h
+++ b/src/os/include/os/os_socket.h
@@ -141,7 +141,7 @@ extern "C" {
     OSAPI_EXPORT _Success_(return == 0) int
     os_getifaddrs(
         _Inout_ os_ifaddrs_t **ifap,
-        _In_opt_ const int *const afs);
+        _In_opt_ const int *afs);
 
     /**
      * @brief Free os_ifaddrs_t structure list allocated by os_getifaddrs()
diff --git a/src/os/src/os_socket.c b/src/os/src/os_socket.c
index 528abad..7d763f7 100644
--- a/src/os/src/os_socket.c
+++ b/src/os/src/os_socket.c
@@ -45,6 +45,18 @@ const os_in6_addr os_in6addr_loopback = { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }
 #define OS_INET_PTON inet_pton
 #endif
 
+const int afs[] = {
+#ifdef __linux
+    AF_PACKET,
+#endif /* __linux */
+#if OS_SOCKET_HAS_IPV6
+    AF_INET6,
+#endif /* OS_SOCKET_HAS_IPV6 */
+    AF_INET
+};
+
+const int *const os_supp_afs = afs;
+
 size_t
 os_sockaddr_get_size(const os_sockaddr *const sa)
 {
diff --git a/src/os/src/posix/os_platform_ifaddrs.c b/src/os/src/posix/os_platform_ifaddrs.c
index 9413352..d1252b9 100644
--- a/src/os/src/posix/os_platform_ifaddrs.c
+++ b/src/os/src/posix/os_platform_ifaddrs.c
@@ -14,6 +14,8 @@
 
 #include "os/os.h"
 
+extern const int *const os_supp_afs;
+
 static int
 copyaddr(os_ifaddrs_t **ifap, const struct ifaddrs *sys_ifa)
 {
@@ -55,7 +57,7 @@ copyaddr(os_ifaddrs_t **ifap, const struct ifaddrs *sys_ifa)
 _Success_(return == 0) int
 os_getifaddrs(
     _Inout_ os_ifaddrs_t **ifap,
-    _In_opt_ const int *const afs)
+    _In_opt_ const int *afs)
 {
     int err = 0;
     int use;
@@ -65,6 +67,10 @@ os_getifaddrs(
 
     assert(ifap != NULL);
 
+    if (afs == NULL) {
+        afs = os_supp_afs;
+    }
+
     if (getifaddrs(&sys_ifa_root) == -1) {
         err = errno;
     } else {
@@ -76,7 +82,7 @@ os_getifaddrs(
         {
             sa = sys_ifa->ifa_addr;
             if (sa != NULL) {
-                use = (afs == NULL);
+                use = 0;
                 for (int i = 0; !use && afs[i] != 0; i++) {
                     use = (sa->sa_family == afs[i]);
                 }
diff --git a/src/os/src/windows/os_platform_ifaddrs.c b/src/os/src/windows/os_platform_ifaddrs.c
index 44ec688..e901f01 100644
--- a/src/os/src/windows/os_platform_ifaddrs.c
+++ b/src/os/src/windows/os_platform_ifaddrs.c
@@ -14,6 +14,8 @@
 
 #include "os/os.h"
 
+extern const int *const os_supp_afs;
+
 static int
 getifaces(PIP_ADAPTER_ADDRESSES *ptr)
 {
@@ -207,7 +209,7 @@ copyaddr(
 _Success_(return == 0) int
 os_getifaddrs(
     _Inout_ os_ifaddrs_t **ifap,
-    _In_opt_ const int *const afs)
+    _In_opt_ const int *afs)
 {
     int err = 0;
     int use;
@@ -219,6 +221,10 @@ os_getifaddrs(
 
     assert(ifap != NULL);
 
+    if (afs == NULL) {
+        afs = os_supp_afs;
+    }
+
     ifa = ifa_root = ifa_next = NULL;
 
     if ((err = getifaces(&ifaces)) == 0 &&
@@ -230,7 +236,7 @@ os_getifaddrs(
                  addr = addr->Next)
             {
                 sa = (struct sockaddr *)addr->Address.lpSockaddr;
-                use = (afs == NULL);
+                use = 0;
                 for (int i = 0; !use && afs[i] != 0; i++) {
                     use = (afs[i] == sa->sa_family);
                 }