diff --git a/hwdb.d/80-ieee1394-unit-function.hwdb b/hwdb.d/80-ieee1394-unit-function.hwdb
index 2ff66f15e0..6fa1329171 100644
--- a/hwdb.d/80-ieee1394-unit-function.hwdb
+++ b/hwdb.d/80-ieee1394-unit-function.hwdb
@@ -42,6 +42,11 @@
 # * Configuration ROM for AV/C Devices 1.0 (Dec. 12, 2000, 1394 Trading Association, TA Document
 #   1999027)
 #
+# Exceptional layout of configuration ROM for legacy device is described in annex of the above
+# document. The layout has some entries for model information in vendor directory instead of root
+# or unit directories. For the case, Linux FireWire subsystem don't detect Model_ID and model name,
+# thus node key without 'mo' field is detected. Wild card pattern is used to match the case with and
+# without mo field in customized key for node device.
 
 # Just for backward compatibility. Please invalidate IEEE1394_UNIT_FUNCTION_VIDEO by adding entries
 # if it is inconvenient.
@@ -1303,6 +1308,17 @@ ieee1394:ven00001287mo00000036sp0000A02Dver00010001
  ID_MODEL_FROM_DATABASE=FireDTV C/CI
  IEEE1394_UNIT_FUNCTION_VIDEO=1
 
+#
+# Legacy layout of configuration ROM described in Annex 1 of 'Configuration ROM for AV/C Devices
+# 1.0 (December 12, 2000, 1394 Trading Association, TA Document 1999027)'.
+#
+
+ieee1394:node:ven0x080046units0x00a02d:0x010001
+ieee1394:ven00080046mo00000000sp0000A02Dver00010001
+ ID_VENDOR_FROM_DATABASE=Sony Corporation
+ ID_MODEL_FROM_DATABASE=DCR-TRV310
+ IEEE1394_UNIT_FUNCTION_VIDEO=1
+
 #
 # Node with multiple units for several functions.
 #