diff --git a/src/server/api/stream/channel.ts b/src/server/api/stream/channel.ts
index 3548e4c37..75914964c 100644
--- a/src/server/api/stream/channel.ts
+++ b/src/server/api/stream/channel.ts
@@ -8,7 +8,7 @@ export default abstract class Channel {
 	protected connection: Connection;
 	public id: string;
 	public abstract readonly chName: string;
-	public abstract readonly shouldShare: boolean;
+	public static readonly shouldShare: boolean;
 
 	protected get user() {
 		return this.connection.user;
diff --git a/src/server/api/stream/channels/drive.ts b/src/server/api/stream/channels/drive.ts
index 4b428a008..7425a620f 100644
--- a/src/server/api/stream/channels/drive.ts
+++ b/src/server/api/stream/channels/drive.ts
@@ -3,7 +3,7 @@ import Channel from '../channel';
 
 export default class extends Channel {
 	public readonly chName = 'drive';
-	public readonly shouldShare = true;
+	public static shouldShare = true;
 
 	@autobind
 	public async init(params: any) {
diff --git a/src/server/api/stream/channels/games/reversi-game.ts b/src/server/api/stream/channels/games/reversi-game.ts
index 9004cdfc6..5dc9ca060 100644
--- a/src/server/api/stream/channels/games/reversi-game.ts
+++ b/src/server/api/stream/channels/games/reversi-game.ts
@@ -9,7 +9,7 @@ import Channel from '../../channel';
 
 export default class extends Channel {
 	public readonly chName = 'gamesReversiGame';
-	public readonly shouldShare = false;
+	public static shouldShare = false;
 
 	private gameId: mongo.ObjectID;
 
diff --git a/src/server/api/stream/channels/games/reversi.ts b/src/server/api/stream/channels/games/reversi.ts
index 0a7684703..51cb264d9 100644
--- a/src/server/api/stream/channels/games/reversi.ts
+++ b/src/server/api/stream/channels/games/reversi.ts
@@ -6,7 +6,7 @@ import Channel from '../../channel';
 
 export default class extends Channel {
 	public readonly chName = 'gamesReversi';
-	public readonly shouldShare = true;
+	public static shouldShare = true;
 
 	@autobind
 	public async init(params: any) {
diff --git a/src/server/api/stream/channels/global-timeline.ts b/src/server/api/stream/channels/global-timeline.ts
index 00f9e01ba..e39ea269a 100644
--- a/src/server/api/stream/channels/global-timeline.ts
+++ b/src/server/api/stream/channels/global-timeline.ts
@@ -6,7 +6,7 @@ import Channel from '../channel';
 
 export default class extends Channel {
 	public readonly chName = 'globalTimeline';
-	public readonly shouldShare = true;
+	public static shouldShare = true;
 
 	private mutedUserIds: string[] = [];
 
diff --git a/src/server/api/stream/channels/hashtag.ts b/src/server/api/stream/channels/hashtag.ts
index 3f4f37ca5..cf652c166 100644
--- a/src/server/api/stream/channels/hashtag.ts
+++ b/src/server/api/stream/channels/hashtag.ts
@@ -6,7 +6,7 @@ import Channel from '../channel';
 
 export default class extends Channel {
 	public readonly chName = 'hashtag';
-	public readonly shouldShare = false;
+	public static shouldShare = false;
 
 	@autobind
 	public async init(params: any) {
diff --git a/src/server/api/stream/channels/home-timeline.ts b/src/server/api/stream/channels/home-timeline.ts
index abdd35612..3fa887f1e 100644
--- a/src/server/api/stream/channels/home-timeline.ts
+++ b/src/server/api/stream/channels/home-timeline.ts
@@ -6,7 +6,7 @@ import Channel from '../channel';
 
 export default class extends Channel {
 	public readonly chName = 'homeTimeline';
-	public readonly shouldShare = true;
+	public static shouldShare = true;
 
 	private mutedUserIds: string[] = [];
 
diff --git a/src/server/api/stream/channels/hybrid-timeline.ts b/src/server/api/stream/channels/hybrid-timeline.ts
index f26668b49..d72545e4c 100644
--- a/src/server/api/stream/channels/hybrid-timeline.ts
+++ b/src/server/api/stream/channels/hybrid-timeline.ts
@@ -6,7 +6,7 @@ import Channel from '../channel';
 
 export default class extends Channel {
 	public readonly chName = 'hybridTimeline';
-	public readonly shouldShare = true;
+	public static shouldShare = true;
 
 	private mutedUserIds: string[] = [];
 
diff --git a/src/server/api/stream/channels/local-timeline.ts b/src/server/api/stream/channels/local-timeline.ts
index 13285604b..0ba0b1b19 100644
--- a/src/server/api/stream/channels/local-timeline.ts
+++ b/src/server/api/stream/channels/local-timeline.ts
@@ -6,7 +6,7 @@ import Channel from '../channel';
 
 export default class extends Channel {
 	public readonly chName = 'localTimeline';
-	public readonly shouldShare = true;
+	public static shouldShare = true;
 
 	private mutedUserIds: string[] = [];
 
diff --git a/src/server/api/stream/channels/main.ts b/src/server/api/stream/channels/main.ts
index f19f5d92a..7d5462c09 100644
--- a/src/server/api/stream/channels/main.ts
+++ b/src/server/api/stream/channels/main.ts
@@ -4,7 +4,7 @@ import Channel from '../channel';
 
 export default class extends Channel {
 	public readonly chName = 'main';
-	public readonly shouldShare = true;
+	public static shouldShare = true;
 
 	@autobind
 	public async init(params: any) {
diff --git a/src/server/api/stream/channels/messaging-index.ts b/src/server/api/stream/channels/messaging-index.ts
index 43acaf9ab..0211d702c 100644
--- a/src/server/api/stream/channels/messaging-index.ts
+++ b/src/server/api/stream/channels/messaging-index.ts
@@ -3,7 +3,7 @@ import Channel from '../channel';
 
 export default class extends Channel {
 	public readonly chName = 'messagingIndex';
-	public readonly shouldShare = true;
+	public static shouldShare = true;
 
 	@autobind
 	public async init(params: any) {
diff --git a/src/server/api/stream/channels/messaging.ts b/src/server/api/stream/channels/messaging.ts
index c862438b0..ab04a332c 100644
--- a/src/server/api/stream/channels/messaging.ts
+++ b/src/server/api/stream/channels/messaging.ts
@@ -4,7 +4,7 @@ import Channel from '../channel';
 
 export default class extends Channel {
 	public readonly chName = 'messaging';
-	public readonly shouldShare = false;
+	public static shouldShare = false;
 
 	private otherpartyId: string;
 
diff --git a/src/server/api/stream/channels/notes-stats.ts b/src/server/api/stream/channels/notes-stats.ts
index 3171ada78..2282f8bc7 100644
--- a/src/server/api/stream/channels/notes-stats.ts
+++ b/src/server/api/stream/channels/notes-stats.ts
@@ -6,7 +6,7 @@ const ev = new Xev();
 
 export default class extends Channel {
 	public readonly chName = 'notesStats';
-	public readonly shouldShare = true;
+	public static shouldShare = true;
 
 	@autobind
 	public async init(params: any) {
diff --git a/src/server/api/stream/channels/server-stats.ts b/src/server/api/stream/channels/server-stats.ts
index 4d0176578..912dcf530 100644
--- a/src/server/api/stream/channels/server-stats.ts
+++ b/src/server/api/stream/channels/server-stats.ts
@@ -6,7 +6,7 @@ const ev = new Xev();
 
 export default class extends Channel {
 	public readonly chName = 'serverStats';
-	public readonly shouldShare = true;
+	public static shouldShare = true;
 
 	@autobind
 	public async init(params: any) {
diff --git a/src/server/api/stream/channels/user-list.ts b/src/server/api/stream/channels/user-list.ts
index 85df4b4f1..b526a5f98 100644
--- a/src/server/api/stream/channels/user-list.ts
+++ b/src/server/api/stream/channels/user-list.ts
@@ -3,7 +3,7 @@ import Channel from '../channel';
 
 export default class extends Channel {
 	public readonly chName = 'userList';
-	public readonly shouldShare = false;
+	public static shouldShare = false;
 
 	@autobind
 	public async init(params: any) {