--- gforth/backtrac.fs	2007/12/31 18:40:23	1.16
+++ gforth/backtrac.fs	2012/12/31 15:25:17	1.19
@@ -1,6 +1,6 @@
 \ backtrace handling
 
-\ Copyright (C) 1999,2000,2003,2004,2006 Free Software Foundation, Inc.
+\ Copyright (C) 1999,2000,2003,2004,2006,2007,2012 Free Software Foundation, Inc.
 
 \ This file is part of Gforth.
 
@@ -96,7 +96,7 @@ IS store-backtrace
 
 : print-backtrace ( addr1 addr2 -- )
     \G print a backtrace for the return stack addr1..addr2
-    cr ." Backtrace:"
+    2dup u< IF  cr ." Backtrace:"  THEN
     swap u+do
 	cr
 	i @ dup hex. ( return-addr? )