diff --git a/board_id/board_ids.csv b/board_id/board_ids.csv
index 6d6ca1b..64a0379 100644
--- a/board_id/board_ids.csv
+++ b/board_id/board_ids.csv
@@ -1,7 +1,7 @@
 # board_id | R1 | R2 | board_name
 "0","510","510","unknown"
 "1","510","620","72_NB2-e"
-"2","510","750","81hd-a"
+"2","510","750","81hd-b"
 "3","510","1000","alpha2ch-b"
 "4","510","1200","alpha4ch-a"
 "5","510","1500","alpha2ch-c"
diff --git a/board_id/generated/board_id_81hd-a.csv b/board_id/generated/board_id_81hd-b.csv
similarity index 100%
rename from board_id/generated/board_id_81hd-a.csv
rename to board_id/generated/board_id_81hd-b.csv