diff --git a/src/common/Common.h b/src/common/Common.h
index ce25b64f..a78728e4 100644
--- a/src/common/Common.h
+++ b/src/common/Common.h
@@ -216,6 +216,8 @@ namespace Sapphire::Common
     HandIn = 2005,
     DamagedGear = 2007,
     //UNKNOWN_1 = 2008,
+    // Temporary inventory that is used for the "trade" window
+    TradeInventory = 2009,
 
     ArmoryOff = 3200,
     ArmoryHead = 3201,