diff --git a/nse_nsock.cc b/nse_nsock.cc
index 372c00c08..e2ff02526 100644
--- a/nse_nsock.cc
+++ b/nse_nsock.cc
@@ -427,8 +427,12 @@ static nse_nsock_udata *check_nsock_udata (lua_State *L, int idx, bool open)
       } else if (0 == o.SourceSockAddr(&ss, &sslen)) {
         // Use the exact protocol-specific length.  Some platforms (e.g. FreeBSD)
         // reject sizeof(sockaddr_storage) passed to bind() with EINVAL.
-        sslen = (ss.ss_family == AF_INET6) ?
-          sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
+        if (ss.ss_family == AF_INET)
+          sslen = sizeof(struct sockaddr_in);
+#if HAVE_IPV6
+        else if (ss.ss_family == AF_INET6)
+          sslen = sizeof(struct sockaddr_in6);
+#endif
         nsock_iod_set_localaddr(nu->nsiod, &ss, sslen);
       }
       if (o.ipoptionslen)
@@ -554,8 +558,12 @@ static int connect (lua_State *L, int status, lua_KContext ctx)
   } else if (0 == o.SourceSockAddr(&ss, &sslen)) {
     // Use the exact protocol-specific length.  Some platforms (e.g. FreeBSD)
     // reject sizeof(sockaddr_storage) passed to bind() with EINVAL.
-    sslen = (ss.ss_family == AF_INET6) ?
-      sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
+    if (ss.ss_family == AF_INET)
+      sslen = sizeof(struct sockaddr_in);
+#if HAVE_IPV6
+    else if (ss.ss_family == AF_INET6)
+      sslen = sizeof(struct sockaddr_in6);
+#endif
     nsock_iod_set_localaddr(nu->nsiod, &ss, sslen);
   }
   if (o.ipoptionslen)
diff --git a/scan_engine_connect.cc b/scan_engine_connect.cc
index c473166a7..7390cd712 100644
--- a/scan_engine_connect.cc
+++ b/scan_engine_connect.cc
@@ -436,8 +436,12 @@ static void init_socket(int sd, const HostScanStats *hss, UltraScanInfo *USI) {
   if (!bind_failed && 0 == o.SourceSockAddr(&ss, &sslen)) {
     // Use the exact protocol-specific length.  Some platforms (e.g. FreeBSD)
     // reject sizeof(sockaddr_storage) passed to bind() with EINVAL.
-    sslen = (ss.ss_family == AF_INET6) ?
-      sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
+    if (ss.ss_family == AF_INET)
+      sslen = sizeof(struct sockaddr_in);
+#if HAVE_IPV6
+    else if (ss.ss_family == AF_INET6)
+      sslen = sizeof(struct sockaddr_in6);
+#endif
     if (::bind(sd, (struct sockaddr*)&ss, sslen) != 0) {
       error("%s: Problem binding source address (%s), errno: %d", __func__, inet_socktop_safe(&ss), socket_errno());
       perror("bind");
diff --git a/service_scan.cc b/service_scan.cc
index ad58b8c90..f22778d5c 100644
--- a/service_scan.cc
+++ b/service_scan.cc
@@ -2139,8 +2139,12 @@ static void startNextProbe(nsock_pool nsp, nsock_iod nsi, ServiceGroup *SG,
       if (0 == svc->target->SourceSockAddr(&ss, &ss_len)) {
         // Use the exact protocol-specific length.  Some platforms (e.g. FreeBSD)
         // reject sizeof(sockaddr_storage) passed to bind() with EINVAL.
-        ss_len = (ss.ss_family == AF_INET6) ?
-          sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
+        if (ss.ss_family == AF_INET)
+          ss_len = sizeof(struct sockaddr_in);
+#if HAVE_IPV6
+        else if (ss.ss_family == AF_INET6)
+          ss_len = sizeof(struct sockaddr_in6);
+#endif
         nsock_iod_set_localaddr(svc->niod, &ss, ss_len);
       }
       if (o.ipoptionslen)