diff --git a/frontend/src/scripts/types/interfaces.ts b/frontend/src/scripts/types/interfaces.ts
index 2c6f0d5be..068b2287b 100644
--- a/frontend/src/scripts/types/interfaces.ts
+++ b/frontend/src/scripts/types/interfaces.ts
@@ -4,7 +4,9 @@ export declare type CustomModes = "custom";
 
 export declare type Mode = "time" | "words" | "quote" | "zen" | CustomModes;
 
-export declare type Mode2 = number | "zen" | "custom";
+export declare type Mode2<M extends Mode> = keyof PersonalBests[M];
+
+// export declare type Mode2 = 10 | 15 | 25 | 30 | 50 | 60 | 100 | 120 | 200 | "zen" | "custom";
 
 export declare type NoncustomWordsModes = 10 | 25 | 50 | 100 | 200;