diff --git a/ares/ares_getnameinfo.c b/ares/ares_getnameinfo.c
index ec0fac05d..bb5ee08d7 100644
--- a/ares/ares_getnameinfo.c
+++ b/ares/ares_getnameinfo.c
@@ -61,10 +61,6 @@
 #include "inet_ntop.h"
 #include "ares_private.h"
 
-#ifdef WATT32
-#undef WIN32
-#endif
-
 struct nameinfo_query {
   ares_nameinfo_callback callback;
   void *arg;