diff --git a/spec/integ/sliding-sync-sdk.spec.ts b/spec/integ/sliding-sync-sdk.spec.ts
index 56ce1c2c5..8b6b71444 100644
--- a/spec/integ/sliding-sync-sdk.spec.ts
+++ b/spec/integ/sliding-sync-sdk.spec.ts
@@ -809,14 +809,14 @@ describe("SlidingSyncSdk", () => {
             });
         });
     });
-    describe("ExtensionRoomEphemeral", () => {
+    describe("ExtensionTyping", () => {
         let ext: Extension;
         beforeAll(async () => {
             await setupClient();
             const hasSynced = sdk!.sync();
             await httpBackend!.flushAllExpected();
             await hasSynced;
-            ext = findExtension("room_ephemeral");
+            ext = findExtension("typing");
         });
         it("gets enabled on the initial request only", () => {
             expect(ext.onRequest(true)).toEqual({
diff --git a/src/sliding-sync-sdk.ts b/src/sliding-sync-sdk.ts
index 78e09ca35..57a8f91a4 100644
--- a/src/sliding-sync-sdk.ts
+++ b/src/sliding-sync-sdk.ts
@@ -233,11 +233,11 @@ class ExtensionAccountData implements Extension {
     }
 }
 
-class ExtensionRoomEphemeral implements Extension {
+class ExtensionTyping implements Extension {
     public constructor(private readonly client: MatrixClient) {}
 
     public name(): string {
-        return "room_ephemeral";
+        return "typing";
     }
 
     public when(): ExtensionState {
@@ -262,7 +262,7 @@ class ExtensionRoomEphemeral implements Extension {
             const ephemeralEvents = mapEvents(this.client, roomId, data.rooms[roomId]);
             const room = this.client.getRoom(roomId);
             if (!room) {
-                logger.warn("got ephemeral events for room but room doesn't exist on client:", roomId);
+                logger.warn("got typing events for room but room doesn't exist on client:", roomId);
                 continue;
             }
             room.addEphemeralEvents(ephemeralEvents);
@@ -313,7 +313,7 @@ export class SlidingSyncSdk {
         const extensions: Extension[] = [
             new ExtensionToDevice(this.client),
             new ExtensionAccountData(this.client),
-            new ExtensionRoomEphemeral(this.client),
+            new ExtensionTyping(this.client),
         ];
         if (this.opts.crypto) {
             extensions.push(