diff --git a/src/matrix-http-api.c b/src/matrix-http-api.c
index 71a86cb..15171ad 100644
--- a/src/matrix-http-api.c
+++ b/src/matrix-http-api.c
@@ -930,6 +930,26 @@ i_event_stream(MatrixAPI *api,
           err);
 }
 
+static void
+i_leave_room(MatrixAPI *api,
+             MatrixAPICallback callback,
+             gpointer user_data,
+             const gchar *room_id,
+             GError **error)
+{
+    gchar *encoded_room_id, *path;
+
+    encoded_room_id = soup_uri_encode(room_id, NULL);
+    path = g_strdup_printf("rooms/%s/leave", encoded_room_id);
+    g_free(encoded_room_id);
+
+    _send(MATRIX_HTTP_API(api),
+          callback, user_data,
+          "POST", path, NULL, NULL,
+          error);
+    g_free(path);
+}
+
 static void
 matrix_http_api_matrix_api_init(MatrixAPIInterface *iface)
 {
@@ -943,4 +963,5 @@ matrix_http_api_matrix_api_init(MatrixAPIInterface *iface)
     iface->create_room = i_create_room;
     iface->initial_sync = i_initial_sync;
     iface->event_stream = i_event_stream;
+    iface->leave_room = i_leave_room;
 }