diff --git a/ares/ares.h b/ares/ares.h
index fd0147480..7f76112f7 100644
--- a/ares/ares.h
+++ b/ares/ares.h
@@ -32,7 +32,7 @@
   #include <sys/socket.h>
   #include <tcp.h>
 #elif defined(WIN32)
-  #include <winsock.h>
+  #include <winsock2.h>
   #include <windows.h>
 #else
   #include <netinet/in.h>