diff --git a/src/bake/client/data-view.ts b/src/bake/client/data-view.ts
index d29c690e5b..22a148e76f 100644
--- a/src/bake/client/data-view.ts
+++ b/src/bake/client/data-view.ts
@@ -1,10 +1,10 @@
 import { td, te } from "../shared";
 
 export class DataViewReader {
-  view: DataView;
+  view: DataView<ArrayBuffer>;
   cursor: number;
 
-  constructor(view: DataView, cursor: number = 0) {
+  constructor(view: DataView<ArrayBuffer>, cursor: number = 0) {
     this.view = view;
     this.cursor = cursor;
   }
diff --git a/src/bake/hmr-runtime-client.ts b/src/bake/hmr-runtime-client.ts
index c3e3671374..04b98fadee 100644
--- a/src/bake/hmr-runtime-client.ts
+++ b/src/bake/hmr-runtime-client.ts
@@ -115,7 +115,7 @@ const handlers = {
       ws.send("i" + config.generation);
     }
   },
-  [MessageId.hot_update](view) {
+  [MessageId.hot_update](view: DataView<ArrayBuffer>) {
     const reader = new DataViewReader(view, 1);
 
     // The code genearting each list is annotated with equivalent "List n"