diff --git a/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/alb/application-listener-rule.ts b/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/alb/application-listener-rule.ts
index 4fe0fe6bda795..8ae395f2b286e 100644
--- a/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/alb/application-listener-rule.ts
+++ b/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/alb/application-listener-rule.ts
@@ -391,7 +391,7 @@ export class ApplicationListenerRule extends Construct {
  * @internal
  * @deprecated
  */
-export function validateFixedResponse(fixedResponse: FixedResponse) {
+function validateFixedResponse(fixedResponse: FixedResponse) {
   if (fixedResponse.statusCode && !/^(2|4|5)\d\d$/.test(fixedResponse.statusCode)) {
     throw new Error('`statusCode` must be 2XX, 4XX or 5XX.');
   }
@@ -406,7 +406,7 @@ export function validateFixedResponse(fixedResponse: FixedResponse) {
  * @internal
  * @deprecated
  */
-export function validateRedirectResponse(redirectResponse: RedirectResponse) {
+function validateRedirectResponse(redirectResponse: RedirectResponse) {
   if (redirectResponse.protocol && !/^(HTTPS?|#\{protocol\})$/i.test(redirectResponse.protocol)) {
     throw new Error('`protocol` must be HTTP, HTTPS, or #{protocol}.');
   }
diff --git a/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/alb/application-listener.ts b/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/alb/application-listener.ts
index 69486685c10ef..098128a3da6af 100644
--- a/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/alb/application-listener.ts
+++ b/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/alb/application-listener.ts
@@ -10,7 +10,7 @@ import { IListenerCertificate, ListenerCertificate } from '../shared/listener-ce
 import { determineProtocolAndPort } from '../shared/util';
 import { ListenerAction } from './application-listener-action';
 import { ApplicationListenerCertificate } from './application-listener-certificate';
-import { ApplicationListenerRule, FixedResponse, RedirectResponse, validateFixedResponse, validateRedirectResponse } from './application-listener-rule';
+import { ApplicationListenerRule, FixedResponse, RedirectResponse } from './application-listener-rule';
 import { IApplicationLoadBalancer } from './application-load-balancer';
 import { ApplicationTargetGroup, IApplicationLoadBalancerTarget, IApplicationTargetGroup } from './application-target-group';
 import { ListenerCondition } from './conditions';
@@ -377,7 +377,18 @@ export class ApplicationListener extends BaseListener implements IApplicationLis
       messageBody: props.messageBody,
     };
 
-    validateFixedResponse(fixedResponse);
+    /**
+     * NOTE - Copy/pasted from `application-listener-rule.ts#validateFixedResponse`.
+     * This was previously a deprecated, exported function, which caused issues with jsii's strip-deprecated functionality.
+     * Inlining the duplication functionality in v2 only (for now).
+     */
+    if (fixedResponse.statusCode && !/^(2|4|5)\d\d$/.test(fixedResponse.statusCode)) {
+      throw new Error('`statusCode` must be 2XX, 4XX or 5XX.');
+    }
+
+    if (fixedResponse.messageBody && fixedResponse.messageBody.length > 1024) {
+      throw new Error('`messageBody` cannot have more than 1024 characters.');
+    }
 
     if (props.priority) {
       new ApplicationListenerRule(this, id + 'Rule', {
@@ -410,7 +421,18 @@ export class ApplicationListener extends BaseListener implements IApplicationLis
       statusCode: props.statusCode,
     };
 
-    validateRedirectResponse(redirectResponse);
+    /**
+     * NOTE - Copy/pasted from `application-listener-rule.ts#validateRedirectResponse`.
+     * This was previously a deprecated, exported function, which caused issues with jsii's strip-deprecated functionality.
+     * Inlining the duplication functionality in v2 only (for now).
+     */
+    if (redirectResponse.protocol && !/^(HTTPS?|#\{protocol\})$/i.test(redirectResponse.protocol)) {
+      throw new Error('`protocol` must be HTTP, HTTPS, or #{protocol}.');
+    }
+
+    if (!redirectResponse.statusCode || !/^HTTP_30[12]$/.test(redirectResponse.statusCode)) {
+      throw new Error('`statusCode` must be HTTP_301 or HTTP_302.');
+    }
 
     if (props.priority) {
       new ApplicationListenerRule(this, id + 'Rule', {