diff --git a/src/incoming-requests.ts b/src/incoming-requests.ts
index b4df313..9c3d375 100644
--- a/src/incoming-requests.ts
+++ b/src/incoming-requests.ts
@@ -97,8 +97,10 @@ export class IncomingRequests {
 
 	async handle(pduObj: PduObject): Promise<void> {
 		const generation = this.linkGeneration;
+		const { onRequest } = this;
 
-		if (this.onRequest && await this.onRequest(this.session, pduObj)) return;
+		// Called unbound, so the application's hook never sees this class as its `this`.
+		if (onRequest && await onRequest(this.session, pduObj)) return;
 
 		// The link it arrived on went while the hook ran, so nothing we answer now correlates.
 		if (this.linkGeneration !== generation) {