diff --git a/crates/api/src/post/mark_read.rs b/crates/api/src/post/mark_read.rs
index a377b3c6..a46e949f 100644
--- a/crates/api/src/post/mark_read.rs
+++ b/crates/api/src/post/mark_read.rs
@@ -11,14 +11,21 @@ pub async fn mark_post_as_read(
   context: Data<LemmyContext>,
   local_user_view: LocalUserView,
 ) -> Result<Json<SuccessResponse>, LemmyError> {
-  let mut post_ids = data.post_ids.iter().cloned().collect::<HashSet<_>>();
-  post_ids.insert(data.post_id);
-  let person_id = local_user_view.person.id;
+  let mut post_ids = HashSet::new();
+  if let Some(post_ids_) = &data.post_ids {
+    post_ids.extend(post_ids_.iter().cloned());
+  }
+
+  if let Some(post_id) = data.post_id {
+    post_ids.insert(post_id);
+  }
 
   if post_ids.len() > MAX_API_PARAM_ELEMENTS {
     Err(LemmyErrorType::TooManyItems)?;
   }
 
+  let person_id = local_user_view.person.id;
+
   // Mark the post as read / unread
   if data.read {
     PostRead::mark_as_read(&mut context.pool(), post_ids, person_id)
diff --git a/crates/api_common/src/post.rs b/crates/api_common/src/post.rs
index fbb6f1d3..b93742be 100644
--- a/crates/api_common/src/post.rs
+++ b/crates/api_common/src/post.rs
@@ -135,14 +135,15 @@ pub struct RemovePost {
   pub reason: Option<String>,
 }
 
+#[skip_serializing_none]
 #[derive(Debug, Serialize, Deserialize, Clone, Default)]
 #[cfg_attr(feature = "full", derive(TS))]
 #[cfg_attr(feature = "full", ts(export))]
 /// Mark a post as read.
 pub struct MarkPostAsRead {
   /// TODO: deprecated, send `post_ids` instead
-  pub post_id: PostId,
-  pub post_ids: Vec<PostId>,
+  pub post_id: Option<PostId>,
+  pub post_ids: Option<Vec<PostId>>,
   pub read: bool,
 }