diff --git a/obj.go b/obj.go
index 420cd94..8df8a4b 100644
--- a/obj.go
+++ b/obj.go
@@ -492,7 +492,7 @@ func addObjItem(name string, code string, itemTypeID64 int64, weight int) (int64
 
 func getObjItemID(s string) int64 {
 	if v, ok := cacheObjItem.Load(s); ok {
-		i := v.(ChatWarsUser)
+		i := v.(ChatWarsItem)
 		return i.ObjID64
 	} else {
 		s := fmt.Sprintf("Object unknown : %s\n", s)