diff --git a/source/patterns/@aws-solutions-constructs/core/lib/lambda-helper.ts b/source/patterns/@aws-solutions-constructs/core/lib/lambda-helper.ts
index f8bd04c21..c7405b267 100644
--- a/source/patterns/@aws-solutions-constructs/core/lib/lambda-helper.ts
+++ b/source/patterns/@aws-solutions-constructs/core/lib/lambda-helper.ts
@@ -47,7 +47,7 @@ export function buildLambdaFunction(scope: Construct, props: BuildLambdaFunction
   // Conditional lambda function creation
   if (!props.existingLambdaObj) {
     if (props.lambdaFunctionProps) {
-      return deployLambdaFunction(scope, props.lambdaFunctionProps, undefined, props.vpc);
+      return deployLambdaFunction(scope, props.lambdaFunctionProps, props.lambdaFunctionProps.functionName, props.vpc);
     } else {
       throw Error('Either existingLambdaObj or lambdaFunctionProps is required');
     }
diff --git a/source/patterns/@aws-solutions-constructs/core/test/lambda-helper.test.ts b/source/patterns/@aws-solutions-constructs/core/test/lambda-helper.test.ts
index f76774dbf..090aa0695 100644
--- a/source/patterns/@aws-solutions-constructs/core/test/lambda-helper.test.ts
+++ b/source/patterns/@aws-solutions-constructs/core/test/lambda-helper.test.ts
@@ -447,4 +447,41 @@ test("Test retrieving lambda vpc security group ids", () => {
 
   expect(securityGroups).toContain(securityGroup1.securityGroupId);
   expect(securityGroups).toContain(securityGroup2.securityGroupId);
-});
\ No newline at end of file
+});
+
+test('test buildLambdaFunction with lambdaFunctionProps default id', () => {
+  const stack = new Stack();
+
+  defaults.buildLambdaFunction(stack, {
+    lambdaFunctionProps: {
+      runtime: lambda.Runtime.NODEJS_14_X,
+      handler: 'index.handler',
+      code: lambda.Code.fromAsset(`${__dirname}/lambda`),
+    }
+  });
+
+  expect(stack).toHaveResourceLike('AWS::Lambda::Function', {
+    Role: {
+      'Fn::GetAtt': ['LambdaFunctionServiceRole0C4CDE0B', 'Arn'],
+    },
+  });
+});
+
+test('test buildLambdaFunction with lambdaFunctionProps custom id', () => {
+  const stack = new Stack();
+
+  defaults.buildLambdaFunction(stack, {
+    lambdaFunctionProps: {
+      functionName: 'MyTestFunction',
+      runtime: lambda.Runtime.NODEJS_14_X,
+      handler: 'index.handler',
+      code: lambda.Code.fromAsset(`${__dirname}/lambda`),
+    }
+  });
+
+  expect(stack).toHaveResourceLike('AWS::Lambda::Function', {
+    Role: {
+      'Fn::GetAtt': ['MyTestFunctionServiceRole37517223', 'Arn'],
+    },
+  });
+});