diff --git a/tests/test_security_null.cpp b/tests/test_security_null.cpp
index c708a376..af2f44da 100644
--- a/tests/test_security_null.cpp
+++ b/tests/test_security_null.cpp
@@ -158,7 +158,7 @@ int main (void)
 
     ip4addr.sin_family = AF_INET;
     ip4addr.sin_port = htons(9003);
-#if (_WIN32_WINNT < 0x0600)
+#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);