diff --git a/boards/uniboard1/libraries/unb1_board/src/vhdl/unb1_board_pkg.vhd b/boards/uniboard1/libraries/unb1_board/src/vhdl/unb1_board_pkg.vhd
index c6a732e979ec72d1eb2570821eefd27b2d6bae0d..979a12ca1f84f82b67964df297f13f76ebca3153 100644
--- a/boards/uniboard1/libraries/unb1_board/src/vhdl/unb1_board_pkg.vhd
+++ b/boards/uniboard1/libraries/unb1_board/src/vhdl/unb1_board_pkg.vhd
@@ -74,6 +74,9 @@ PACKAGE unb1_board_pkg IS
   -- I2C
   CONSTANT c_unb1_board_reg_sens_adr_w       : NATURAL := 3;  -- must match ceil_log2(c_mm_nof_dat) in unb1_board_sens_reg.vhd
   
+  -- 10G
+  CONSTANT c_unb1_board_nof_mdio             : NATURAL := 3;  -- Number of MD interfaces
+   
   -- CONSTANT RECORD DECLARATIONS ---------------------------------------------
   
   -- PHY interface instantiation control