diff --git a/src/backend/libpq/be-fsstubs.c b/src/backend/libpq/be-fsstubs.c
index 4571798ff3b..775ec8d4e44 100644
--- a/src/backend/libpq/be-fsstubs.c
+++ b/src/backend/libpq/be-fsstubs.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/libpq/be-fsstubs.c,v 1.82 2006/04/26 00:34:57 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/libpq/be-fsstubs.c,v 1.83 2006/09/07 15:37:25 momjian Exp $
  *
  * NOTES
  *	  This should be moved to a more appropriate place.  It is here
@@ -165,7 +165,7 @@ lo_read(int fd, char *buf, int len)
 }
 
 int
-lo_write(int fd, char *buf, int len)
+lo_write(int fd, const char *buf, int len)
 {
 	int			status;
 
diff --git a/src/backend/storage/large_object/inv_api.c b/src/backend/storage/large_object/inv_api.c
index 582eabdb2ad..1575db6a942 100644
--- a/src/backend/storage/large_object/inv_api.c
+++ b/src/backend/storage/large_object/inv_api.c
@@ -17,7 +17,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/storage/large_object/inv_api.c,v 1.119 2006/07/31 20:09:05 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/storage/large_object/inv_api.c,v 1.120 2006/09/07 15:37:25 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -488,7 +488,7 @@ inv_read(LargeObjectDesc *obj_desc, char *buf, int nbytes)
 }
 
 int
-inv_write(LargeObjectDesc *obj_desc, char *buf, int nbytes)
+inv_write(LargeObjectDesc *obj_desc, const char *buf, int nbytes)
 {
 	int			nwritten = 0;
 	int			n;
diff --git a/src/include/libpq/be-fsstubs.h b/src/include/libpq/be-fsstubs.h
index 9703dc5cc11..961bfb6c685 100644
--- a/src/include/libpq/be-fsstubs.h
+++ b/src/include/libpq/be-fsstubs.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/libpq/be-fsstubs.h,v 1.26 2006/03/05 15:58:56 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/libpq/be-fsstubs.h,v 1.27 2006/09/07 15:37:25 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -41,7 +41,7 @@ extern Datum lo_unlink(PG_FUNCTION_ARGS);
  * but too late now...
  */
 extern int	lo_read(int fd, char *buf, int len);
-extern int	lo_write(int fd, char *buf, int len);
+extern int	lo_write(int fd, const char *buf, int len);
 
 /*
  * Cleanup LOs at xact commit/abort
diff --git a/src/include/storage/large_object.h b/src/include/storage/large_object.h
index ce37e83345a..ebb7be81368 100644
--- a/src/include/storage/large_object.h
+++ b/src/include/storage/large_object.h
@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/storage/large_object.h,v 1.34 2006/04/26 00:34:57 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/storage/large_object.h,v 1.35 2006/09/07 15:37:25 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -77,6 +77,6 @@ extern int	inv_drop(Oid lobjId);
 extern int	inv_seek(LargeObjectDesc *obj_desc, int offset, int whence);
 extern int	inv_tell(LargeObjectDesc *obj_desc);
 extern int	inv_read(LargeObjectDesc *obj_desc, char *buf, int nbytes);
-extern int	inv_write(LargeObjectDesc *obj_desc, char *buf, int nbytes);
+extern int	inv_write(LargeObjectDesc *obj_desc, const char *buf, int nbytes);
 
 #endif   /* LARGE_OBJECT_H */
diff --git a/src/interfaces/libpq/fe-lobj.c b/src/interfaces/libpq/fe-lobj.c
index f8859ca32df..998a5648992 100644
--- a/src/interfaces/libpq/fe-lobj.c
+++ b/src/interfaces/libpq/fe-lobj.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-lobj.c,v 1.58 2006/06/14 17:49:25 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-lobj.c,v 1.59 2006/09/07 15:37:25 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -172,7 +172,7 @@ lo_read(PGconn *conn, int fd, char *buf, size_t len)
  * returns the number of bytes written, or -1 on failure.
  */
 int
-lo_write(PGconn *conn, int fd, char *buf, size_t len)
+lo_write(PGconn *conn, int fd, const char *buf, size_t len)
 {
 	PQArgBlock	argv[2];
 	PGresult   *res;
diff --git a/src/interfaces/libpq/libpq-fe.h b/src/interfaces/libpq/libpq-fe.h
index 26c0a104fb5..135791a4f1e 100644
--- a/src/interfaces/libpq/libpq-fe.h
+++ b/src/interfaces/libpq/libpq-fe.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-fe.h,v 1.132 2006/08/18 19:52:39 tgl Exp $
+ * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-fe.h,v 1.133 2006/09/07 15:37:25 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -483,7 +483,7 @@ PQprintTuples(const PGresult *res,
 extern int	lo_open(PGconn *conn, Oid lobjId, int mode);
 extern int	lo_close(PGconn *conn, int fd);
 extern int	lo_read(PGconn *conn, int fd, char *buf, size_t len);
-extern int	lo_write(PGconn *conn, int fd, char *buf, size_t len);
+extern int	lo_write(PGconn *conn, int fd, const char *buf, size_t len);
 extern int	lo_lseek(PGconn *conn, int fd, int offset, int whence);
 extern Oid	lo_creat(PGconn *conn, int mode);
 extern Oid	lo_create(PGconn *conn, Oid lobjId);