diff --git a/src/api/controller.rs b/src/api/controller.rs
index 18e5136..12ed35e 100644
--- a/src/api/controller.rs
+++ b/src/api/controller.rs
@@ -25,14 +25,11 @@ pub(crate) trait ControllerWorker<T : Sized + Send + Sync> {
 /// * if async is not feasible a [Controller::poll]/[Controller::try_recv] approach is possible
 #[async_trait::async_trait]
 pub trait Controller<T : Sized + Send + Sync> : Sized + Send + Sync {
-	/// type of upstream values, used in [Self::send]
-	type Input;
-
 	/// enqueue a new value to be sent to all other users
 	///
 	/// success or failure of this function does not imply validity of sent operation,
 	/// because it's integrated asynchronously on the background worker
-	fn send(&self, x: Self::Input) -> Result<()>;
+	fn send(&self, x: T) -> Result<()>;
 
 	/// get next value from other users, blocking until one is available
 	///
diff --git a/src/buffer/controller.rs b/src/buffer/controller.rs
index 129f492..21dca71 100644
--- a/src/buffer/controller.rs
+++ b/src/buffer/controller.rs
@@ -77,8 +77,6 @@ impl Drop for StopOnDrop {
 
 #[async_trait]
 impl Controller<TextChange> for BufferController {
-	type Input = TextChange;
-
 	/// block until a text change is available
 	/// this returns immediately if one is already available
 	async fn poll(&self) -> crate::Result<()> {
diff --git a/src/cursor/controller.rs b/src/cursor/controller.rs
index 320871a..3f579d1 100644
--- a/src/cursor/controller.rs
+++ b/src/cursor/controller.rs
@@ -67,8 +67,6 @@ impl CursorController {
 
 #[async_trait]
 impl Controller<Cursor> for CursorController {
-	type Input = Cursor;
-
 	/// enqueue a cursor event to be broadcast to current workspace
 	/// will automatically invert cursor start/end if they are inverted
 	fn send(&self, mut cursor: Cursor) -> crate::Result<()> {