diff --git a/src/include/access/xlog.h b/src/include/access/xlog.h
index 20083e14c54fc6e68985b03b772f3b81fe92de46..d0cb6550b69821c4914af38472f8c0ed21ea0e6c 100644
--- a/src/include/access/xlog.h
+++ b/src/include/access/xlog.h
@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.96 2010/01/15 09:19:06 heikki Exp $
+ * $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.97 2010/01/16 00:04:41 tgl Exp $
  */
 #ifndef XLOG_H
 #define XLOG_H
@@ -132,7 +132,7 @@ typedef struct XLogRecData
 	struct XLogRecData *next;	/* next struct in chain, or NULL */
 } XLogRecData;
 
-extern TimeLineID ThisTimeLineID;		/* current TLI */
+extern PGDLLIMPORT TimeLineID ThisTimeLineID;		/* current TLI */
 
 /*
  * Prior to 8.4, all activity during recovery was carried out by Startup
diff --git a/src/include/libpq/pqsignal.h b/src/include/libpq/pqsignal.h
index 4003030c2e4bc9b6a5036e2817d4509869099af4..01117f7f05a25a34e28bf7d30d012ca46126c82b 100644
--- a/src/include/libpq/pqsignal.h
+++ b/src/include/libpq/pqsignal.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/libpq/pqsignal.h,v 1.37 2010/01/02 16:58:04 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/libpq/pqsignal.h,v 1.38 2010/01/16 00:04:41 tgl Exp $
  *
  * NOTES
  *	  This shouldn't be in libpq, but the monitor and some other
@@ -27,7 +27,7 @@ extern sigset_t UnBlockSig,
 
 #define PG_SETMASK(mask)	sigprocmask(SIG_SETMASK, mask, NULL)
 #else /* not HAVE_SIGPROCMASK */
-extern int	UnBlockSig,
+extern PGDLLIMPORT int	UnBlockSig,
 			BlockSig,
 			StartupBlockSig;
 
diff --git a/src/include/replication/walreceiver.h b/src/include/replication/walreceiver.h
index 7651a696a0fee498733b5a482300800ccf89bd74..f848a9e509c71efbd129448805ed07ad55c5797a 100644
--- a/src/include/replication/walreceiver.h
+++ b/src/include/replication/walreceiver.h
@@ -5,7 +5,7 @@
  *
  * Portions Copyright (c) 2010-2010, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/include/replication/walreceiver.h,v 1.1 2010/01/15 09:19:09 heikki Exp $
+ * $PostgreSQL: pgsql/src/include/replication/walreceiver.h,v 1.2 2010/01/16 00:04:41 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -58,7 +58,7 @@ typedef struct
 	slock_t	mutex;		/* locks shared variables shown above */
 } WalRcvData;
 
-extern WalRcvData *WalRcv;
+extern PGDLLIMPORT WalRcvData *WalRcv;
 
 extern Size WalRcvShmemSize(void);
 extern void WalRcvShmemInit(void);
diff --git a/src/include/storage/ipc.h b/src/include/storage/ipc.h
index 18b8c5a2dce0bd0b60b9ce02efb54e23c75e7649..3144d6452898f0239118e770b2645849a790cd4d 100644
--- a/src/include/storage/ipc.h
+++ b/src/include/storage/ipc.h
@@ -11,7 +11,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/storage/ipc.h,v 1.79 2010/01/02 16:58:08 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/storage/ipc.h,v 1.80 2010/01/16 00:04:41 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -62,7 +62,7 @@ typedef void (*shmem_startup_hook_type) (void);
 
 
 /* ipc.c */
-extern bool proc_exit_inprogress;
+extern PGDLLIMPORT bool proc_exit_inprogress;
 
 extern void proc_exit(int code);
 extern void shmem_exit(int code);