diff --git a/src/github/graphql.ts b/src/github/graphql.ts
index f8abed5b44..ad48671e85 100644
--- a/src/github/graphql.ts
+++ b/src/github/graphql.ts
@@ -262,7 +262,7 @@ export interface TimelineEventsResponse {
 	repository: {
 		pullRequest: {
 			timelineItems: {
-				nodes: (MergedEvent | Review | IssueComment | Commit | AssignedEvent | HeadRefDeletedEvent)[];
+				nodes: (MergedEvent | Review | IssueComment | Commit | AssignedEvent | HeadRefDeletedEvent | null)[];
 			};
 		};
 	} | null;
diff --git a/src/github/utils.ts b/src/github/utils.ts
index e8a689ed33..fba9d565ec 100644
--- a/src/github/utils.ts
+++ b/src/github/utils.ts
@@ -1120,6 +1120,7 @@ export async function parseCombinedTimelineEvents(
 		| GraphQL.AssignedEvent
 		| GraphQL.HeadRefDeletedEvent
 		| GraphQL.CrossReferencedEvent
+		| null
 	)[],
 	restEvents: Common.TimelineEvent[],
 	githubRepository: GitHubRepository,
@@ -1149,6 +1150,9 @@ export async function parseCombinedTimelineEvents(
 
 	// TODO: work the rest events into the appropriate place in the timeline
 	for (const event of events) {
+		if (!event) {
+			continue;
+		}
 		const type = convertGraphQLEventType(event.__typename);
 
 		switch (type) {