diff --git a/@sammo/game_logic/src/ResourceController.ts b/@sammo/game_logic/src/ResourceController.ts
index 0d1d698..65cc243 100644
--- a/@sammo/game_logic/src/ResourceController.ts
+++ b/@sammo/game_logic/src/ResourceController.ts
@@ -44,7 +44,7 @@ export interface IResourceController{
 
     getTroop(id: TroopID, nation: NationID): Troop | undefined;
 
-    _getAllChanges(): Map<unknown, unknown>;
+    _getAllChanges(): Map<`${ValidEntityType<any>}_${number}`, LazyEntityUpdater<any>>;
 
     setDirty(entity: LazyEntityUpdater<any>): void;