diff --git a/src/rt/rfwfs/collection.ts b/src/rt/rfwfs/collection.ts
index 7477352..1e9a405 100644
--- a/src/rt/rfwfs/collection.ts
+++ b/src/rt/rfwfs/collection.ts
@@ -2,7 +2,7 @@ import { type Entry } from "./main"
 
 import entry_search from "./index"
 
-type Files<T> = Entry<T>[]
+type Files<T extends Entry<T>> = Entry<T>[]
 
 interface EntryCollectionManipulate<T extends Entry<T>> {
 	pop: (file_name: string) => Entry<T> | undefined,
diff --git a/src/rt/rfwfs/index.ts b/src/rt/rfwfs/index.ts
index 8a1b289..79b9bbd 100644
--- a/src/rt/rfwfs/index.ts
+++ b/src/rt/rfwfs/index.ts
@@ -1,11 +1,11 @@
 import { type Entry } from "./main"
 import { type Files } from "./collection"
 
-interface Wrap<T extends Entry<T>> {
+interface Wrap<T> {
 	readonly result: T,
 	readonly index: number
 }
-function wrap_result<T extends Entry<T>>(result: T, index: number): Wrap<T> {
+function wrap_result<T>(result: T, index: number): Wrap<T> {
 	return { result: result, index: index }
 }
 
diff --git a/src/rt/rfwfs/main.ts b/src/rt/rfwfs/main.ts
index ad9d1fe..1c5e6a0 100644
--- a/src/rt/rfwfs/main.ts
+++ b/src/rt/rfwfs/main.ts
@@ -11,7 +11,7 @@ const enum Permissions {
 	none
 }
 
-interface Entry<T> {
+interface Entry<T extends Entry<T>> {
 	readonly name: string,
 	readonly type: EntryType,
 	readonly inner: T,