diff --git a/libraries/io/ddr/src/vhdl/io_ddr_driver_flush_ctrl.vhd b/libraries/io/ddr/src/vhdl/io_ddr_driver_flush_ctrl.vhd
index 47570632ec087859b8155a000e172a45a7c7c315..f2f9e6aac4ee8b1484ca90f68b3c4ac81cafe39d 100644
--- a/libraries/io/ddr/src/vhdl/io_ddr_driver_flush_ctrl.vhd
+++ b/libraries/io/ddr/src/vhdl/io_ddr_driver_flush_ctrl.vhd
@@ -22,6 +22,7 @@
 
 LIBRARY IEEE, common_lib, dp_lib;
 USE IEEE.STD_LOGIC_1164.ALL;
+USE IEEE.NUMERIC_STD.ALL;
 USE common_lib.common_pkg.ALL;
 USE dp_lib.dp_stream_pkg.ALL;