diff --git a/src/events/http/Endpoint.js b/src/events/http/Endpoint.js
index 9aeadc3a8..c3e03f0d3 100644
--- a/src/events/http/Endpoint.js
+++ b/src/events/http/Endpoint.js
@@ -108,7 +108,7 @@ export default class Endpoint {
   // loosely based on:
   // https://github.com/serverless/serverless/blob/v1.59.2/lib/plugins/aws/package/compile/events/apiGateway/lib/validate.js#L380
   #getIntegration(http) {
-    const { integration, async: isAsync } = http
+    const { integration } = http
     if (integration) {
       const normalizedIntegration = integration.toUpperCase().replace('-', '_')
       if (normalizedIntegration === 'LAMBDA') {
diff --git a/src/events/http/lambda-events/LambdaProxyIntegrationEvent.js b/src/events/http/lambda-events/LambdaProxyIntegrationEvent.js
index 35c340182..eccb92217 100644
--- a/src/events/http/lambda-events/LambdaProxyIntegrationEvent.js
+++ b/src/events/http/lambda-events/LambdaProxyIntegrationEvent.js
@@ -33,7 +33,7 @@ export default class LambdaProxyIntegrationEvent {
     path,
     stageVariables,
     routeKey,
-    isAsync = false,
+    isAsync,
     additionalRequestContext,
     v3Utils,
   ) {
@@ -42,7 +42,7 @@ export default class LambdaProxyIntegrationEvent {
     this.#request = request
     this.#stage = stage
     this.#stageVariables = stageVariables
-    this.#isAsync = isAsync
+    this.#isAsync = isAsync || false
     this.#additionalRequestContext = additionalRequestContext || {}
     if (v3Utils) {
       this.log = v3Utils.log