diff --git a/ares/ares.h b/ares/ares.h
index fd01474803361e4b1f49f56d9266beaceb61a60c..7f76112f7141bff9ebac0fa2a3b71f59fc31dd63 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>