diff --git a/tests/test_security_curve.cpp b/tests/test_security_curve.cpp
index 6c075978..d9db69ad 100644
--- a/tests/test_security_curve.cpp
+++ b/tests/test_security_curve.cpp
@@ -245,7 +245,11 @@ int main (void)
 
     ip4addr.sin_family = AF_INET;
     ip4addr.sin_port = htons (9998);
-    inet_pton (AF_INET, "127.0.0.1", &ip4addr.sin_addr);
+#if (ZMQ_HAVE_WINDOWS and _WIN32_WINNT < 0x0600)
+    ip4addr.sin_addr.s_addr = inet_addr ("127.0.0.1");
+#else
+     inet_pton(AF_INET, "127.0.0.1", &ip4addr.sin_addr);
+#endif
 
     s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
     rc = connect (s, (struct sockaddr*) &ip4addr, sizeof (ip4addr));