diff --git a/boards/uniboard2c/libraries/unb2c_board/src/vhdl/ctrl_unb2c_board.vhd b/boards/uniboard2c/libraries/unb2c_board/src/vhdl/ctrl_unb2c_board.vhd
index 7e40438a50927c01c1e28dd680d6ab43ca4e1a6a..a999f85989155bd507bab58df4f2abaeb37e0c80 100644
--- a/boards/uniboard2c/libraries/unb2c_board/src/vhdl/ctrl_unb2c_board.vhd
+++ b/boards/uniboard2c/libraries/unb2c_board/src/vhdl/ctrl_unb2c_board.vhd
@@ -47,7 +47,7 @@ ENTITY ctrl_unb2c_board IS
     g_fw_version   : t_unb2c_board_fw_version := (0, 0);  -- firmware version x.y
     g_stamp_date   : NATURAL := 0;
     g_stamp_time   : NATURAL := 0;
-    g_revision_id  : STRING  := "";  -- revision_id, commit hash or number 
+    g_revision_id  : STRING  := "";  -- revision_id, commit hash (first 9 chars) or number 
     g_design_note  : STRING  := "UNUSED";
     g_base_ip      : STD_LOGIC_VECTOR(16-1 DOWNTO 0) := X"0A63"; -- Base IP address used by unb_osy: 10.99.xx.yy
     g_mm_clk_freq  : NATURAL := c_unb2c_board_mm_clk_freq_125M;