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diff --git a/testsuite/vests/vhdl-93/ashenden/compliant/ch_20_fg_20_11.vhd b/testsuite/vests/vhdl-93/ashenden/compliant/ch_20_fg_20_11.vhd
new file mode 100644
index 000000000..bc11774c4
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+++ b/testsuite/vests/vhdl-93/ashenden/compliant/ch_20_fg_20_11.vhd
@@ -0,0 +1,75 @@
+
+-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+-- for more details. 
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+-- ---------------------------------------------------------------------
+--
+-- $Id: ch_20_fg_20_11.vhd,v 1.2 2001-10-26 16:29:36 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+entity fg_20_11 is
+end entity fg_20_11;
+
+
+architecture test of fg_20_11 is
+begin
+
+-- code from book
+
+  process is
+
+            procedure add_with_overflow ( a, b : in integer;
+                                          sum : out integer;
+                                          overflow : out boolean ) is -- . . .
+
+    -- not in book
+  begin
+  end;
+  -- end not in book
+
+  procedure add_with_overflow ( a, b : in bit_vector;
+                                sum : out bit_vector;
+                                overflow : out boolean ) is -- . . .
+
+    -- not in book
+  begin
+  end;
+  -- end not in book
+
+  attribute built_in : string;
+
+  attribute built_in of
+    add_with_overflow [ integer, integer,
+                        integer, boolean ] : procedure is "int_add_overflow";
+
+  attribute built_in of
+    add_with_overflow [ bit_vector, bit_vector,
+                        bit_vector, boolean ] : procedure is "bit_vector_add_overflow";
+
+  begin
+    -- . . .
+    -- not in book
+    wait;
+    -- end not in book
+  end process;
+
+-- end code from book
+
+end architecture test;