diff --git a/libraries/dsp/fringe_stop/src/vhdl/fringe_stop_unit.vhd b/libraries/dsp/fringe_stop/src/vhdl/fringe_stop_unit.vhd
index 9fab8cc04d7058fefd0223c504797747363755b8..a9fbe650d8a188fc1db9a1008ac1b728d6bab608 100644
--- a/libraries/dsp/fringe_stop/src/vhdl/fringe_stop_unit.vhd
+++ b/libraries/dsp/fringe_stop/src/vhdl/fringe_stop_unit.vhd
@@ -27,6 +27,7 @@ USE IEEE.numeric_std.ALL;
 LIBRARY common_lib, common_mult_lib, technology_lib, dp_lib;
 USE common_lib.common_pkg.ALL;
 USE common_lib.common_mem_pkg.ALL;
+USE common_lib.common_math_pkg.ALL;
 USE technology_lib.technology_select_pkg.ALL;
 USE dp_lib.dp_stream_pkg.ALL;
 
diff --git a/libraries/dsp/fringe_stop/tb/vhdl/tb_fringe_stop_unit.vhd b/libraries/dsp/fringe_stop/tb/vhdl/tb_fringe_stop_unit.vhd
index 8b4a0f62d3677ad72470b299ffa509e0cf3bb693..f2fc7be35948a4bf0dc3ce31e03b86fdc90a9e90 100644
--- a/libraries/dsp/fringe_stop/tb/vhdl/tb_fringe_stop_unit.vhd
+++ b/libraries/dsp/fringe_stop/tb/vhdl/tb_fringe_stop_unit.vhd
@@ -37,6 +37,7 @@ USE common_lib.common_mem_pkg.ALL;
 USE common_lib.common_str_pkg.ALL;
 USE common_lib.tb_common_pkg.ALL;
 USE common_lib.tb_common_mem_pkg.ALL;
+USE common_lib.common_math_pkg.ALL;
 USE technology_lib.technology_select_pkg.ALL;
 USE mm_lib.mm_file_unb_pkg.ALL;
 USE mm_lib.mm_file_pkg.ALL;