diff --git a/common/js/types.d.ts b/common/js/types.d.ts
index d9190b510..a4daa57df 100644
--- a/common/js/types.d.ts
+++ b/common/js/types.d.ts
@@ -469,7 +469,7 @@ export interface UserGameStats<I extends IDStrings = IDStrings> extends MongoDBD
     playtype: IDStringToPlaytype[I];
     rating: number;
     lampRating: number;
-    customRatings: GameSpecificCalcLookup[I];
+    customRatings: Record<GameSpecificCalcLookup[I], number>;
     classes: Record<string, string>;
 }
 /**
diff --git a/common/src/types.ts b/common/src/types.ts
index 4ae9cb42c..0baf389e4 100644
--- a/common/src/types.ts
+++ b/common/src/types.ts
@@ -642,7 +642,7 @@ export interface UserGameStats<I extends IDStrings = IDStrings> extends MongoDBD
     playtype: IDStringToPlaytype[I];
     rating: number;
     lampRating: number;
-    customRatings: GameSpecificCalcLookup[I];
+    customRatings: Record<GameSpecificCalcLookup[I], number>;
     classes: Record<string, string>; // bad
 }