diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index 636b12f737f..5e705a36b4f 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -37,7 +37,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.551.2.5 2009/12/02 17:41:31 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.551.2.6 2010/04/01 20:12:34 heikki Exp $
  *
  * NOTES
  *
@@ -1174,7 +1174,7 @@ pmdaemonize(void)
 		ExitPostmaster(1);
 	}
 #endif
-	i = open(NULL_DEV, O_RDWR, 0);
+	i = open(DEVNULL, O_RDWR, 0);
 	dup2(i, 0);
 	dup2(i, 1);
 	dup2(i, 2);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 198ca263247..3b1ad0b0f3c 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -18,7 +18,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/postmaster/syslogger.c,v 1.44.2.2 2009/11/19 02:45:50 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/postmaster/syslogger.c,v 1.44.2.3 2010/04/01 20:12:34 heikki Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -184,7 +184,7 @@ SysLoggerMain(int argc, char *argv[])
 	 */
 	if (redirection_done)
 	{
-		int			fd = open(NULL_DEV, O_WRONLY, 0);
+		int			fd = open(DEVNULL, O_WRONLY, 0);
 
 		/*
 		 * The closes might look redundant, but they are not: we want to be
@@ -194,9 +194,12 @@ SysLoggerMain(int argc, char *argv[])
 		 */
 		close(fileno(stdout));
 		close(fileno(stderr));
-		dup2(fd, fileno(stdout));
-		dup2(fd, fileno(stderr));
-		close(fd);
+		if (fd != -1)
+		{
+			dup2(fd, fileno(stdout));
+			dup2(fd, fileno(stderr));
+			close(fd);
+		}
 	}
 
 	/*
diff --git a/src/include/c.h b/src/include/c.h
index 5803a28bf30..aca767ce8a9 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/c.h,v 1.222.2.2 2009/03/11 00:08:07 alvherre Exp $
+ * $PostgreSQL: pgsql/src/include/c.h,v 1.222.2.3 2010/04/01 20:12:34 heikki Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -762,7 +762,11 @@ typedef NameData *Name;
 #include <unistd.h>
 #endif
 
-/* These are for things that are one way on Unix and another on NT */
+/*
+ * This only works on Unix, not on Windows! This isn't used in PostgreSQL
+ * anymore, use the platform-aware DEVNULL instead. This is kept here just
+ * in case a 3rd party module uses it.
+ */
 #define NULL_DEV		"/dev/null"
 
 /*