diff --git a/.changeset/chilly-jars-drop.md b/.changeset/chilly-jars-drop.md
new file mode 100644
index 00000000..7197a369
--- /dev/null
+++ b/.changeset/chilly-jars-drop.md
@@ -0,0 +1,5 @@
+---
+"@dassie/lib-protocol-stream": patch
+---
+
+Immediately stop sending when scope is disposed
diff --git a/packages/lib-protocol-stream/src/connection/send-until-done.ts b/packages/lib-protocol-stream/src/connection/send-until-done.ts
index ed1316e3..6ac6b6dc 100644
--- a/packages/lib-protocol-stream/src/connection/send-until-done.ts
+++ b/packages/lib-protocol-stream/src/connection/send-until-done.ts
@@ -14,7 +14,7 @@ export function sendUntilDone(state: ConnectionState) {
 
   state.sendLoopPromise = (async function sendLoop() {
     for (;;) {
-      const hasWork = hasWorkToDo(state)
+      const hasWork = !state.scope.isDisposed && hasWorkToDo(state)
 
       // If we have no more new work to do and no work is in progress, that
       // means we are fully done and can end the loop.