diff --git a/os/Xtrans.h b/os/Xtrans.h
index 8319fde46a..b774963281 100644
--- a/os/Xtrans.h
+++ b/os/Xtrans.h
@@ -109,24 +109,6 @@ typedef int BytesReadable_t;
 typedef long BytesReadable_t;
 #endif
 
-
-#if defined(WIN32)
-
-/*
- *      _XSERVTransWritev use struct iovec, normally found
- *      in Berkeley systems in <sys/uio.h>.  See the readv(2) and writev(2)
- *      manual pages for details.
- */
-
-struct iovec {
-    caddr_t iov_base;
-    int iov_len;
-};
-
-#else
-#include <sys/uio.h>
-#endif
-
 typedef struct _XtransConnInfo *XtransConnInfo;
 
 /*