diff --git a/packages/@aws-cdk/aws-eks/lib/cluster-resource-handler/common.ts b/packages/@aws-cdk/aws-eks/lib/cluster-resource-handler/common.ts
index 6f17be9738019..57d3ae20f8cef 100644
--- a/packages/@aws-cdk/aws-eks/lib/cluster-resource-handler/common.ts
+++ b/packages/@aws-cdk/aws-eks/lib/cluster-resource-handler/common.ts
@@ -14,22 +14,6 @@ export interface EksUpdateId {
 
 export type ResourceEvent = AWSLambda.CloudFormationCustomResourceEvent & EksUpdateId;
 
-/**
- * Decodes encoded true/false values
- */
-function decodeBooleans(object: object) {
-  return JSON.parse(JSON.stringify(object), (_k, v) => {
-    switch (v) {
-      case 'TRUE:BOOLEAN':
-        return true;
-      case 'FALSE:BOOLEAN':
-        return false;
-      default:
-        return v;
-    }
-  });
-}
-
 export abstract class ResourceHandler {
   protected readonly requestId: string;
   protected readonly logicalResourceId: string;
@@ -49,10 +33,6 @@ export abstract class ResourceHandler {
       throw new Error('AssumeRoleArn must be provided');
     }
 
-    if (event.ResourceProperties.Config) {
-      this.event.ResourceProperties.Config = decodeBooleans(event.ResourceProperties.Config);
-    }
-
     eks.configureAssumeRole({
       RoleArn: roleToAssume,
       RoleSessionName: `AWSCDK.EKSCluster.${this.requestType}.${this.requestId}`,