diff --git a/src/timezone/pgtz.c b/src/timezone/pgtz.c
index 82a0243878..6d0df5dc0c 100644
--- a/src/timezone/pgtz.c
+++ b/src/timezone/pgtz.c
@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/timezone/pgtz.c,v 1.63 2009/06/11 14:49:15 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/timezone/pgtz.c,v 1.63.2.1 2010/04/06 20:35:17 mha Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1087,7 +1087,8 @@ identify_system_timezone(void)
 		if ((r = RegQueryValueEx(key, "Std", NULL, NULL, zonename, &namesize)) != ERROR_SUCCESS)
 		{
 			ereport(WARNING,
-					(errmsg_internal("could not query value for 'std' to identify Windows timezone: %i", (int) r)));
+					(errmsg_internal("could not query value for 'std' to identify Windows timezone \"%s\": %i",
+									 keyname, (int) r)));
 			RegCloseKey(key);
 			break;
 		}
@@ -1103,7 +1104,8 @@ identify_system_timezone(void)
 		if ((r = RegQueryValueEx(key, "Dlt", NULL, NULL, zonename, &namesize)) != ERROR_SUCCESS)
 		{
 			ereport(WARNING,
-					(errmsg_internal("could not query value for 'dlt' to identify Windows timezone: %i", (int) r)));
+					(errmsg_internal("could not query value for 'dlt' to identify Windows timezone \"%s\": %i",
+									 keyname, (int) r)));
 			RegCloseKey(key);
 			break;
 		}