diff --git a/boards/uniboard2a/libraries/unb2a_board/src/vhdl/ctrl_unb2_board.vhd b/boards/uniboard2a/libraries/unb2a_board/src/vhdl/ctrl_unb2_board.vhd
index fe7766abf5dbf4bef619ff7b1d4349e29d1a4694..4e76c651b8c47229d1b54c9e9320893d9d23b592 100644
--- a/boards/uniboard2a/libraries/unb2a_board/src/vhdl/ctrl_unb2_board.vhd
+++ b/boards/uniboard2a/libraries/unb2a_board/src/vhdl/ctrl_unb2_board.vhd
@@ -306,6 +306,9 @@ ARCHITECTURE str OF ctrl_unb2_board IS
   attribute keep of led_toggle_red:   signal is true;
   attribute keep of led_toggle_green: signal is true;
 
+  attribute maxfan : integer;
+  attribute maxfan of dp_rst : signal is 1024;
+
 BEGIN
 
   ext_clk200 <= i_ext_clk200;