diff --git a/src/backend/port/win32/error.c b/src/backend/port/win32/error.c
index 426eecbf69..c7f0a24f10 100644
--- a/src/backend/port/win32/error.c
+++ b/src/backend/port/win32/error.c
@@ -6,14 +6,14 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/port/win32/error.c,v 1.4 2004/12/31 22:00:37 pgsql Exp $
+ *	  $PostgreSQL: pgsql/src/backend/port/win32/error.c,v 1.5 2005/10/07 16:34:48 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
 
 #include "postgres.h"
 
-static struct
+static const struct
 {
 	DWORD		winerr;
 	int			doserr;
@@ -74,6 +74,9 @@ static struct
 	{
 		ERROR_LOCK_VIOLATION, EACCES
 	},
+	{
+		ERROR_SHARING_VIOLATION, EACCES
+	},
 	{
 		ERROR_BAD_NETPATH, ENOENT
 	},
@@ -168,21 +171,21 @@ _dosmaperr(unsigned long e)
 		return;
 	}
 
-	for (i = 0; i < sizeof(doserrors) / sizeof(doserrors[0]); i++)
+	for (i = 0; i < lengthof(doserrors); i++)
 	{
 		if (doserrors[i].winerr == e)
 		{
 			errno = doserrors[i].doserr;
 			ereport(DEBUG5,
-					(errmsg_internal("Mapped win32 error code %i to %i",
-									 (int) e, errno)));
+					(errmsg_internal("mapped win32 error code %lu to %d",
+									  e, errno)));
 			return;
 		}
 	}
 
-	ereport(DEBUG4,
-			(errmsg_internal("Unknown win32 error code: %i",
-							 (int) e)));
+	ereport(LOG,
+			(errmsg_internal("unrecognized win32 error code: %lu",
+							 e)));
 	errno = EINVAL;
 	return;
 }