diff --git a/sim/core/database.go b/sim/core/database.go
index 204571e366..9a863231c2 100644
--- a/sim/core/database.go
+++ b/sim/core/database.go
@@ -10,26 +10,23 @@ import (
 
 var WITH_DB = false
 
-var ItemsByID map[int32]Item
-var GemsByID map[int32]Gem
-var EnchantsByEffectID map[int32]Enchant
+var ItemsByID = map[int32]Item{}
+var GemsByID = map[int32]Gem{}
+var EnchantsByEffectID = map[int32]Enchant{}
 
 func addToDatabase(newDB *proto.SimDatabase) {
-	ItemsByID = make(map[int32]Item, len(newDB.Items))
 	for _, v := range newDB.Items {
 		if _, ok := ItemsByID[v.Id]; !ok {
 			ItemsByID[v.Id] = ItemFromProto(v)
 		}
 	}
 
-	EnchantsByEffectID = make(map[int32]Enchant, len(newDB.Enchants))
 	for _, v := range newDB.Enchants {
 		if _, ok := EnchantsByEffectID[v.EffectId]; !ok {
 			EnchantsByEffectID[v.EffectId] = EnchantFromProto(v)
 		}
 	}
 
-	GemsByID = make(map[int32]Gem, len(newDB.Gems))
 	for _, v := range newDB.Gems {
 		if _, ok := GemsByID[v.Id]; !ok {
 			GemsByID[v.Id] = GemFromProto(v)