diff --git a/packages/backend/src/services/following/requests/cancel.ts b/packages/backend/src/services/following/requests/cancel.ts
index b3e64c4f4..999ebc64e 100644
--- a/packages/backend/src/services/following/requests/cancel.ts
+++ b/packages/backend/src/services/following/requests/cancel.ts
@@ -7,6 +7,11 @@ import { IdentifiableError } from '@/misc/identifiable-error.js';
 import { User } from '@/models/entities/user.js';
 import { Users, FollowRequests } from '@/models/index.js';
 
+/**
+ * Cancel a follow request from `follower` to `followee`.
+ * @param followee User that was going to be followed
+ * @param follower User who is making the follow request
+ */
 export async function cancelFollowRequest(followee: User, follower: User): Promise<void> {
 	if (Users.isRemoteUser(followee)) {
 		const content = renderActivity(renderUndo(renderFollow(follower, followee), follower));