diff --git a/crates/ruma-client-api/CHANGELOG.md b/crates/ruma-client-api/CHANGELOG.md
index d5c168f4..fccee448 100644
--- a/crates/ruma-client-api/CHANGELOG.md
+++ b/crates/ruma-client-api/CHANGELOG.md
@@ -17,6 +17,7 @@ Breaking changes:
   `ruma-common`); the previous fields are in the `Standard` variant
 * Use `GlobalAccountDataEventType` for `event_type` in `config::get_global_account_data`
 * Use `RoomAccountDataEventType` for `event_type` in `config::get_room_account_data`
+* Use `ToDeviceEventType` for `event_type` in `to_device::send_event_to_device`
 
 Improvements:
 
diff --git a/crates/ruma-client-api/src/to_device/send_event_to_device.rs b/crates/ruma-client-api/src/to_device/send_event_to_device.rs
index 2e6d9dbd..04c96f05 100644
--- a/crates/ruma-client-api/src/to_device/send_event_to_device.rs
+++ b/crates/ruma-client-api/src/to_device/send_event_to_device.rs
@@ -11,7 +11,7 @@ pub mod v3 {
 
     use ruma_common::{
         api::{request, response, Metadata},
-        events::AnyToDeviceEventContent,
+        events::{AnyToDeviceEventContent, ToDeviceEventType},
         metadata,
         serde::Raw,
         to_device::DeviceIdOrAllDevices,
@@ -33,7 +33,7 @@ pub mod v3 {
     pub struct Request {
         /// Type of event being sent to each device.
         #[ruma_api(path)]
-        pub event_type: String,
+        pub event_type: ToDeviceEventType,
 
         /// The transaction ID for this event.
         ///
@@ -61,7 +61,11 @@ pub mod v3 {
 
     impl Request {
         /// Creates a new `Request` with the given event type, transaction ID and raw messages.
-        pub fn new_raw(event_type: String, txn_id: OwnedTransactionId, messages: Messages) -> Self {
+        pub fn new_raw(
+            event_type: ToDeviceEventType,
+            txn_id: OwnedTransactionId,
+            messages: Messages,
+        ) -> Self {
             Self { event_type, txn_id, messages }
         }
     }