diff --git a/src/backend/storage/file/fd.c b/src/backend/storage/file/fd.c
index 496fc481633986e0a8191a89d332fbd923943b51..edce16471ed8d2ea6733c82daf34a433951c9d12 100644
--- a/src/backend/storage/file/fd.c
+++ b/src/backend/storage/file/fd.c
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/storage/file/fd.c,v 1.125 2006/01/17 23:52:31 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/storage/file/fd.c,v 1.126 2006/03/04 21:32:47 tgl Exp $
  *
  * NOTES:
  *
@@ -1236,7 +1236,7 @@ FileTruncate(File file, long offset)
  * Ideally this should be the *only* direct call of fopen() in the backend.
  */
 FILE *
-AllocateFile(char *name, char *mode)
+AllocateFile(const char *name, const char *mode)
 {
 	FILE	   *file;
 
diff --git a/src/include/storage/fd.h b/src/include/storage/fd.h
index 5b1ebe743ba3fda007b0afda07fa6587efd0e5c6..41c81e23c76211f2139fca6c19b46717c36819b6 100644
--- a/src/include/storage/fd.h
+++ b/src/include/storage/fd.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/storage/fd.h,v 1.54 2005/10/15 02:49:46 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/storage/fd.h,v 1.55 2006/03/04 21:32:46 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -71,7 +71,7 @@ extern long FileSeek(File file, long offset, int whence);
 extern int	FileTruncate(File file, long offset);
 
 /* Operations that allow use of regular stdio --- USE WITH CAUTION */
-extern FILE *AllocateFile(char *name, char *mode);
+extern FILE *AllocateFile(const char *name, const char *mode);
 extern int	FreeFile(FILE *file);
 
 /* Operations to allow use of the <dirent.h> library routines */