diff --git a/src/r0/search/search_events.rs b/src/r0/search/search_events.rs
index 58796f89..e9d67459 100644
--- a/src/r0/search/search_events.rs
+++ b/src/r0/search/search_events.rs
@@ -85,7 +85,7 @@ pub struct EventContext {
 }
 
 /// Context for search results, if requested.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct EventContextResult {
     /// Pagination token for the end of the chunk.
     pub end: String,
@@ -155,7 +155,7 @@ pub enum OrderBy {
 }
 
 /// Categories of events that can be searched for.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct ResultCategories {
     /// Room event results.
     #[serde(skip_serializing_if = "Option::is_none")]
@@ -163,7 +163,7 @@ pub struct ResultCategories {
 }
 
 /// Categories of events that can be searched for.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct RoomEventResults {
     /// An approximate count of the total number of results found.
     pub count: UInt,
@@ -198,7 +198,7 @@ pub struct ResultGroup {
 }
 
 /// A search result.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct SearchResult {
     /// Context for result, if requested.
     #[serde(skip_serializing_if = "Option::is_none")]
diff --git a/src/r0/send/send_message_event.rs b/src/r0/send/send_message_event.rs
index 46b3043f..c97fd0a1 100644
--- a/src/r0/send/send_message_event.rs
+++ b/src/r0/send/send_message_event.rs
@@ -1,7 +1,7 @@
 //! [PUT /_matrix/client/r0/rooms/{roomId}/send/{eventType}/{txnId}](https://matrix.org/docs/spec/client_server/r0.4.0.html#put-matrix-client-r0-rooms-roomid-send-eventtype-txnid)
 
 use ruma_api::ruma_api;
-use ruma_events::{room::message::MessageEventContent, EventResult, EventType};
+use ruma_events::{room::message::MessageEventContent, EventType};
 use ruma_identifiers::{EventId, RoomId};
 
 ruma_api! {
@@ -30,7 +30,7 @@ ruma_api! {
         pub txn_id: String,
         /// The event's content.
         #[ruma_api(body)]
-        pub data: EventResult<MessageEventContent>, // FIXME
+        pub data: MessageEventContent,
     }
 
     response {
diff --git a/src/r0/sync/sync_events.rs b/src/r0/sync/sync_events.rs
index e054c42e..21845d9c 100644
--- a/src/r0/sync/sync_events.rs
+++ b/src/r0/sync/sync_events.rs
@@ -114,7 +114,7 @@ mod filter_def_serde {
 }
 
 /// Updates to rooms.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct Rooms {
     /// The rooms that the user has left or been banned from.
     pub leave: HashMap<RoomId, LeftRoom>,
@@ -125,7 +125,7 @@ pub struct Rooms {
 }
 
 /// Historical updates to left rooms.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct LeftRoom {
     /// The timeline of messages and state changes in the room up to the point when the user
     /// left.
@@ -135,7 +135,7 @@ pub struct LeftRoom {
 }
 
 /// Updates to joined rooms.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct JoinedRoom {
     /// Counts of unread notifications for this room.
     pub unread_notifications: UnreadNotificationsCount,
@@ -164,7 +164,7 @@ pub struct UnreadNotificationsCount {
 }
 
 /// Events in the room.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct Timeline {
     /// True if the number of events returned was limited by the `limit` on the filter.
     pub limited: bool,
@@ -176,42 +176,42 @@ pub struct Timeline {
 }
 
 /// State events in the room.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct State {
     /// A list of state events.
     pub events: Vec<EventResult<only::StateEvent>>,
 }
 
 /// The private data that this user has attached to this room.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct AccountData {
     /// A list of events.
     pub events: Vec<EventResult<only::Event>>,
 }
 
 /// Ephemeral events not recorded in the timeline or state of the room.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct Ephemeral {
     /// A list of events.
     pub events: Vec<EventResult<only::Event>>,
 }
 
 /// Updates to the rooms that the user has been invited to.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct InvitedRoom {
     /// The state of a room that the user has been invited to.
     pub invite_state: InviteState,
 }
 
 /// The state of a room that the user has been invited to.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct InviteState {
     /// A list of state events.
     pub events: Vec<EventResult<stripped::StrippedState>>,
 }
 
 /// Updates to the presence status of other users.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct Presence {
     /// A list of events.
     pub events: Vec<EventResult<only::Event>>,