diff --git a/src/backends/AsyncStore.ts b/src/backends/AsyncStore.ts
index 7f8940444..6182bd718 100644
--- a/src/backends/AsyncStore.ts
+++ b/src/backends/AsyncStore.ts
@@ -118,6 +118,9 @@ export interface AsyncRWTransaction extends AsyncROTransaction {
 	abort(): Promise<void>;
 }
 
+/**
+ * Async preload file for usage with AsyncStore
+ */
 export class AsyncFile extends PreloadFile<AsyncStoreFS> {
 	constructor(_fs: AsyncStoreFS, _path: string, _flag: FileFlag, _stat: Stats, contents?: Uint8Array) {
 		super(_fs, _path, _flag, _stat, contents);
@@ -159,8 +162,8 @@ export interface AsyncStoreOptions {
 }
 
 /**
- * An "Asynchronous key-value file system". Stores data to/retrieves data from
- * an underlying asynchronous key-value store.
+ * An asynchronous file system which uses an async store to store its data.
+ * @see AsyncStore
  */
 export class AsyncStoreFS extends Async(FileSystem) {
 	protected store: AsyncStore;
diff --git a/src/file.ts b/src/file.ts
index acfde5b84..f0e8994e5 100644
--- a/src/file.ts
+++ b/src/file.ts
@@ -398,7 +398,7 @@ export abstract class File {
  * extend this class and implement those two methods.
  * @todo 'close' lever that disables functionality once closed.
  */
-export abstract class PreloadFile<T extends FileSystem> extends File {
+export abstract class PreloadFile<FS extends FileSystem> extends File {
 	protected _position: number = 0;
 	protected _dirty: boolean = false;
 	/**
@@ -417,7 +417,7 @@ export abstract class PreloadFile<T extends FileSystem> extends File {
 		/**
 		 * The file system that created the file.
 		 */
-		protected fs: T,
+		protected fs: FS,
 		/**
 		 * Path to the file
 		 */