diff --git a/src/game/Group.h b/src/game/Group.h
index f19e2bb9f..5148a919f 100644
--- a/src/game/Group.h
+++ b/src/game/Group.h
@@ -82,7 +82,7 @@ enum GroupUpdateFlags
     GROUP_UPDATE_FLAG_PET_CUR_POWER     = 0x00010000,       // uint16 pet cur power
     GROUP_UPDATE_FLAG_PET_MAX_POWER     = 0x00020000,       // uint16 pet max power
     GROUP_UPDATE_FLAG_PET_AURAS         = 0x00040000,       // uint64 mask, for each bit set uint32 spellid + uint8 unk, pet auras...
-    GROUP_UPDATE_FLAG_UNKNOWN1          = 0x00080000,       // uint32, added in WotLK
+    GROUP_UPDATE_FLAG_VEHICLE_SEAT      = 0x00080000,       // uint32 vehicle_seat_id (index from VehicleSeat.dbc)
     GROUP_UPDATE_PET                    = 0x0007FC00,       // all pet flags
     GROUP_UPDATE_FULL                   = 0x0007FFFF,       // all known flags
 };