diff --git a/src/matrix/net/HomeServerApi.js b/src/matrix/net/HomeServerApi.js
index 051bb44a..77e02d76 100644
--- a/src/matrix/net/HomeServerApi.js
+++ b/src/matrix/net/HomeServerApi.js
@@ -185,6 +185,14 @@ export class HomeServerApi {
     getPushers(options = null) {
         return this._get("/pushers", null, null, options);
     }
+
+    join(roomId, options = null) {
+        return this._post(`/rooms/${encodeURIComponent(roomId)}/join`, null, null, options);
+    }
+
+    leave(roomId, options = null) {
+        return this._post(`/rooms/${encodeURIComponent(roomId)}/leave`, null, null, options);
+    }
 }
 
 import {Request as MockRequest} from "../../mocks/Request.js";
diff --git a/src/matrix/room/Invite.js b/src/matrix/room/Invite.js
index 3a59594e..3508d111 100644
--- a/src/matrix/room/Invite.js
+++ b/src/matrix/room/Invite.js
@@ -70,11 +70,13 @@ export class Invite extends EventEmitter {
     async accept() {
         this._accepting = true;
         this._emitChange("accepting");
+        await this._hsApi.join(this._roomId).response();
     }
 
     async reject() {
         this._rejecting = true;
         this._emitChange("rejecting");
+        await this._hsApi.leave(this._roomId).response();
     }
 
     get accepting() {