diff --git a/testing/crypto_speed_test.c b/testing/crypto_speed_test.c
index 05f4aaf2..bc8052da 100644
--- a/testing/crypto_speed_test.c
+++ b/testing/crypto_speed_test.c
@@ -8,6 +8,8 @@
 //Windows XP
 #define WINVER 0x0501
 #endif
+
+#include <winsock2.h>
 #include <windows.h>
 double get_time()
 {
diff --git a/toxcore/network.c b/toxcore/network.c
index 3abd71e0..ff0cdf29 100644
--- a/toxcore/network.c
+++ b/toxcore/network.c
@@ -20,6 +20,10 @@
  *  along with Tox.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+
+#if (_WIN32_WINNT >= _WIN32_WINNT_WINXP)
+#define _WIN32_WINNT  0x501
+#endif
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"