diff --git a/.changeset/violet-pianos-bake.md b/.changeset/violet-pianos-bake.md
new file mode 100644
index 000000000000..11cf636920e9
--- /dev/null
+++ b/.changeset/violet-pianos-bake.md
@@ -0,0 +1,5 @@
+---
+"langchain": patch
+---
+
+docs: update an outdated middleware example
diff --git a/libs/langchain/src/agents/middleware.ts b/libs/langchain/src/agents/middleware.ts
index 07c483509982..91bc867e2db5 100644
--- a/libs/langchain/src/agents/middleware.ts
+++ b/libs/langchain/src/agents/middleware.ts
@@ -41,9 +41,9 @@ import {
  *   contextSchema: z.object({
  *     userId: z.string(),
  *   }),
- *   beforeModel: async (state, runtime, controls) => {
+ *   beforeModel: async (state, runtime) => {
  *     if (!state.isAuthenticated) {
- *       return controls.terminate(new Error("Not authenticated"));
+ *       throw new Error("Not authenticated");
  *     }
  *   },
  * });