diff --git a/web/src/stream_data.ts b/web/src/stream_data.ts
index aefb018a99..e33b95c6be 100644
--- a/web/src/stream_data.ts
+++ b/web/src/stream_data.ts
@@ -14,12 +14,11 @@ import * as settings_config from "./settings_config.ts";
 import * as settings_data from "./settings_data.ts";
 import type {CurrentUser, GroupSettingValue, StateData} from "./state_data.ts";
 import {current_user, realm} from "./state_data.ts";
-import type {StreamPermissionGroupSetting, StreamTopicsPolicy} from "./stream_types.ts";
+import type {APIStream, StreamPermissionGroupSetting, StreamTopicsPolicy} from "./stream_types.ts";
 import * as sub_store from "./sub_store.ts";
 import type {
     ApiStreamSubscription,
     NeverSubscribedStream,
-    Stream,
     StreamSpecificNotificationSettings,
     StreamSubscription,
 } from "./sub_store.ts";
@@ -1037,12 +1036,11 @@ export async function maybe_fetch_is_user_subscribed(
     );
 }
 
-export function create_streams(streams: Stream[]): void {
+export function create_streams(streams: APIStream[]): void {
     for (const stream of streams) {
         // We handle subscriber stuff in other events.
 
         const attrs = {
-            stream_weekly_traffic: null,
             subscribers: [],
             ...stream,
         };
diff --git a/web/src/stream_types.ts b/web/src/stream_types.ts
index dda6f0ed71..ce62c4f45c 100644
--- a/web/src/stream_types.ts
+++ b/web/src/stream_types.ts
@@ -60,11 +60,6 @@ export const stream_schema = z.object({
     rendered_description: z.string(),
     stream_id: z.number(),
     stream_post_policy: z.enum(StreamPostPolicy),
-    // This field is stripped from subscriber objects when loading data
-    // from the server. Always use `peer_data.get_subscriber_count` to
-    // access channel subscriber counts, and see its comments for notes
-    // about the possibility of inaccuracy in the presence of certain races.
-    subscriber_count: z.optional(z.number()),
     topics_policy: stream_topics_policy_schema,
 });
 
@@ -79,7 +74,13 @@ export const stream_specific_notification_settings_schema = z.object({
 export const api_stream_schema = z.object({
     ...stream_schema.shape,
     stream_weekly_traffic: z.nullable(z.number()),
+    // This field is stripped from subscriber objects when loading data
+    // from the server. Always use `peer_data.get_subscriber_count` to
+    // access channel subscriber counts, and see its comments for notes
+    // about the possibility of inaccuracy in the presence of certain races.
+    subscriber_count: z.number(),
 });
+export type APIStream = z.infer<typeof api_stream_schema>;
 
 export const never_subscribed_stream_schema = z.object({
     ...api_stream_schema.shape,