diff --git a/libraries/io/aduh/tb/vhdl/tb_tb_lvdsh_dd_phs4.vhd b/libraries/io/aduh/tb/vhdl/tb_tb_lvdsh_dd_phs4.vhd
index bfc33a13977e27ddebd2e77feddc906e6714e6d1..d0dedccdc380eaca94e6035bc291b02635495cf0 100644
--- a/libraries/io/aduh/tb/vhdl/tb_tb_lvdsh_dd_phs4.vhd
+++ b/libraries/io/aduh/tb/vhdl/tb_tb_lvdsh_dd_phs4.vhd
@@ -31,6 +31,7 @@ END tb_tb_lvdsh_dd_phs4;
 ARCHITECTURE tb OF tb_tb_lvdsh_dd_phs4 IS
 
   CONSTANT c_dp_phs_clk_period : NATURAL := 32;
+  SIGNAL tb_end : STD_LOGIC := '0';  -- declare tb_end to avoid 'No objects found' error on 'when -label tb_end'
   
 BEGIN
 
diff --git a/libraries/io/aduh/tb/vhdl/tb_tb_lvdsh_dd_wb4.vhd b/libraries/io/aduh/tb/vhdl/tb_tb_lvdsh_dd_wb4.vhd
index 21399729c7e7e850505820e9e6eda67759635324..9819918f06c05410455ea98532c1090e9f0e841d 100644
--- a/libraries/io/aduh/tb/vhdl/tb_tb_lvdsh_dd_wb4.vhd
+++ b/libraries/io/aduh/tb/vhdl/tb_tb_lvdsh_dd_wb4.vhd
@@ -29,6 +29,7 @@ END tb_tb_lvdsh_dd_wb4;
 
 
 ARCHITECTURE tb OF tb_tb_lvdsh_dd_wb4 IS
+  SIGNAL tb_end : STD_LOGIC := '0';  -- declare tb_end to avoid 'No objects found' error on 'when -label tb_end'
 BEGIN
 
   -- > as 3