diff --git a/src/bin/pg_id/pg_id.c b/src/bin/pg_id/pg_id.c
index 743bc3d42f..7fa66d0c4c 100644
--- a/src/bin/pg_id/pg_id.c
+++ b/src/bin/pg_id/pg_id.c
@@ -6,7 +6,7 @@
  *
  * Copyright (c) 2000-2003, PostgreSQL Global Development Group
  *
- * $Header: /cvsroot/pgsql/src/bin/pg_id/Attic/pg_id.c,v 1.24 2003/09/07 03:43:53 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/bin/pg_id/Attic/pg_id.c,v 1.25 2003/10/10 01:34:51 momjian Exp $
  */
 #include "postgres_fe.h"
 
@@ -38,6 +38,7 @@ main(int argc, char *argv[])
 		char pw_name[128];
 	} pass_win32;
 	struct passwd_win32 *pw = &pass_win32;
+	unsigned long pwname_size = sizeof(pass_win32.pw_name) - 1;
 
 	pw->pw_uid = 1;
 #endif
@@ -113,7 +114,7 @@ main(int argc, char *argv[])
 		exit(1);
 	}
 
-	GetUserName(pw->pw_name, sizeof(pw->pw_name)-1);
+	GetUserName(pw->pw_name, &pwname_size);
 #endif
 
 	if (!limit_user_info)