diff --git a/src/filter.ts b/src/filter.ts
index e42eea95536..eb619e78df8 100644
--- a/src/filter.ts
+++ b/src/filter.ts
@@ -65,7 +65,7 @@ export interface IFilterDefinition {
 export interface IRoomEventFilter extends IFilterComponent {
     lazy_load_members?: boolean;
     include_redundant_members?: boolean;
-    types?: EventType[] | string[];
+    types?: Array<EventType | string>;
     [UNSTABLE_FILTER_RELATION_TYPES.name]?: Array<RelationType | string>;
     [UNSTABLE_FILTER_RELATION_SENDERS.name]?: string[];
 }
diff --git a/src/models/event-timeline-set.ts b/src/models/event-timeline-set.ts
index b5c6e4800c6..11dea131f4d 100644
--- a/src/models/event-timeline-set.ts
+++ b/src/models/event-timeline-set.ts
@@ -209,7 +209,7 @@ export class EventTimelineSet extends EventEmitter {
      *
      * @fires module:client~MatrixClient#event:"Room.timelineReset"
      */
-    public resetLiveTimeline(backPaginationToken: string, forwardPaginationToken?: string): void {
+    public resetLiveTimeline(backPaginationToken?: string, forwardPaginationToken?: string): void {
         // Each EventTimeline has RoomState objects tracking the state at the start
         // and end of that timeline. The copies at the end of the live timeline are
         // special because they will have listeners attached to monitor changes to