--- xxgdb.man.orig	1994-12-02 17:40:19.000000000 -0800
+++ xxgdb.man	2014-03-26 12:27:51.559896216 -0700
@@ -29,7 +29,8 @@
 .LP
 The name of the debugger invoked by \fIxxgdb\fP is, by default, gdb, but
 it can be overridden with the environment variable XXGDB_DEBUGGER or with
-the db_name option.
+the db_name option. Additionally, the prompt string can be overridden with
+the environment variable XXGDB_DBXPROMPT or with the db_prompt option.
 .SH OPTIONS
 \fIXxgdb\fP accepts all of the standard X Toolkit command line options 
 (see \fIX\fP(1)), and all the gdb options (see \fIgdb\fP(1)), plus