diff --git a/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/AwsServiceConfigIntegration.kt b/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/AwsServiceConfigIntegration.kt
index 0bbfe81a5ed..3497b6738b5 100644
--- a/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/AwsServiceConfigIntegration.kt
+++ b/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/AwsServiceConfigIntegration.kt
@@ -47,13 +47,13 @@ class AwsServiceConfigIntegration : KotlinIntegration {
         val serviceSymbol: Symbol = writer.getContextValue(ServiceGenerator.SectionServiceCompanionObject.ServiceSymbol)
         writer.withBlock("companion object {", "}") {
             withBlock(
-                "operator fun invoke(sharedConfig: #T? = null, block: Config.DslBuilder.() -> Unit = {}): #L {",
+                "operator fun invoke(sharedConfig: #T? = null, block: Config.Builder.() -> Unit = {}): #L {",
                 "}",
                 AwsRuntimeTypes.Types.AwsClientConfig,
                 serviceSymbol.name
             ) {
                 withBlock(
-                    "val config = Config.BuilderImpl().apply { ",
+                    "val config = Config.Builder().apply { ",
                     "}.apply(block).build()"
                 ) {
                     write("region = sharedConfig?.region")
diff --git a/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/protocols/RestXml.kt b/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/protocols/RestXml.kt
index 5bffdb8bc58..4b92b6d574d 100644
--- a/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/protocols/RestXml.kt
+++ b/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/protocols/RestXml.kt
@@ -175,7 +175,7 @@ open class RestXml : AwsHttpBindingProtocolGenerator() {
         val boundMemberName = boundMember.capitalizedDefaultName()
         val deserializeLambdaIdent = "deserialize$boundMemberName"
         writer.withBlock("val $deserializeLambdaIdent = {", "}") {
-            write("val builder = #T.builder()", memberSymbol)
+            write("val builder = #T.Builder()", memberSymbol)
             renderDeserializerBody(ctx, copyWithMemberTraits, targetShape.members().toList(), writer)
             write("builder.build()")
         }
diff --git a/codegen/smithy-aws-kotlin-codegen/src/test/kotlin/aws/sdk/kotlin/codegen/AwsServiceConfigIntegrationTest.kt b/codegen/smithy-aws-kotlin-codegen/src/test/kotlin/aws/sdk/kotlin/codegen/AwsServiceConfigIntegrationTest.kt
index 6230eecb66c..6b9c9c0d0e0 100644
--- a/codegen/smithy-aws-kotlin-codegen/src/test/kotlin/aws/sdk/kotlin/codegen/AwsServiceConfigIntegrationTest.kt
+++ b/codegen/smithy-aws-kotlin-codegen/src/test/kotlin/aws/sdk/kotlin/codegen/AwsServiceConfigIntegrationTest.kt
@@ -50,9 +50,20 @@ class AwsServiceConfigIntegrationTest {
         contents.shouldContainOnlyOnceWithDiff(expectedProps)
 
         val expectedImpl = """
-        override var credentialsProvider: CredentialsProvider? = null
-        override var endpointResolver: AwsEndpointResolver? = null
-        override var region: String? = null
+        /**
+         * The AWS credentials provider to use for authenticating requests. If not provided a
+         * [aws.sdk.kotlin.runtime.auth.credentials.DefaultChainCredentialsProvider] instance will be used.
+         */
+        var credentialsProvider: CredentialsProvider? = null
+        /**
+         * Determines the endpoint (hostname) to make requests to. When not provided a default
+         * resolver is configured automatically. This is an advanced client option.
+         */
+        var endpointResolver: AwsEndpointResolver? = null
+        /**
+         * AWS region to make requests to
+         */
+        var region: String? = null
 """
         contents.shouldContainOnlyOnceWithDiff(expectedImpl)
     }
diff --git a/codegen/smithy-aws-kotlin-codegen/src/test/kotlin/aws/sdk/kotlin/codegen/PresignerGeneratorTest.kt b/codegen/smithy-aws-kotlin-codegen/src/test/kotlin/aws/sdk/kotlin/codegen/PresignerGeneratorTest.kt
index b039f7fc500..3410946f1b1 100644
--- a/codegen/smithy-aws-kotlin-codegen/src/test/kotlin/aws/sdk/kotlin/codegen/PresignerGeneratorTest.kt
+++ b/codegen/smithy-aws-kotlin-codegen/src/test/kotlin/aws/sdk/kotlin/codegen/PresignerGeneratorTest.kt
@@ -224,53 +224,32 @@ class PresignerGeneratorTest {
              * This type can be used to presign requests in cases where an existing service client
              * instance is not available.
              */
-            class TestPresignConfig private constructor(builder: BuilderImpl): ServicePresignConfig {
+            class TestPresignConfig private constructor(builder: Builder): ServicePresignConfig {
                 override val credentialsProvider: CredentialsProvider = builder.credentialsProvider ?: DefaultChainCredentialsProvider()
                 override val endpointResolver: AwsEndpointResolver = builder.endpointResolver ?: DefaultEndpointResolver()
                 override val region: String = requireNotNull(builder.region) { "region is a required configuration property" }
                 override val serviceId: String = "example"
                 override val signingName: String = "example-signing-name"
                 companion object {
-                    @JvmStatic
-                    fun fluentBuilder(): FluentBuilder = BuilderImpl()
-            
-                    operator fun invoke(block: DslBuilder.() -> kotlin.Unit): ServicePresignConfig = BuilderImpl().apply(block).build()
-                }
-            
-                interface FluentBuilder {
-                    fun credentialsProvider(credentialsProvider: CredentialsProvider): FluentBuilder
-                    fun endpointResolver(endpointResolver: AwsEndpointResolver): FluentBuilder
-                    fun region(region: String): FluentBuilder
-                    fun build(): TestPresignConfig
+                    inline operator fun invoke(block: Builder.() -> kotlin.Unit): ServicePresignConfig = Builder().apply(block).build()
                 }
             
-                interface DslBuilder {
+                class Builder {
                     /**
                      * The AWS credentials provider to use for authenticating requests. If not provided a [aws.sdk.kotlin.runtime.auth.credentials.DefaultChainCredentialsProvider] instance will be used.
                      */
-                    var credentialsProvider: CredentialsProvider?
-            
+                    var credentialsProvider: CredentialsProvider? = null
                     /**
                      * Determines the endpoint (hostname) to make requests to. When not provided a default resolver is configured automatically. This is an advanced client option.
                      */
-                    var endpointResolver: AwsEndpointResolver?
-            
+                    var endpointResolver: AwsEndpointResolver? = null
                     /**
                      * AWS region to make requests for
                      */
-                    var region: String?
-            
-                }
-            
-                internal class BuilderImpl() : FluentBuilder, DslBuilder {
-                    override var credentialsProvider: CredentialsProvider? = null
-                    override var endpointResolver: AwsEndpointResolver? = null
-                    override var region: String? = null
+                    var region: String? = null
             
-                    override fun build(): TestPresignConfig = TestPresignConfig(this)
-                    override fun credentialsProvider(credentialsProvider: CredentialsProvider): FluentBuilder = apply { this.credentialsProvider = credentialsProvider }
-                    override fun endpointResolver(endpointResolver: AwsEndpointResolver): FluentBuilder = apply { this.endpointResolver = endpointResolver }
-                    override fun region(region: String): FluentBuilder = apply { this.region = region }
+                    @PublishedApi
+                    internal fun build(): TestPresignConfig = TestPresignConfig(this)
                 }
             }
         """.trimIndent()
diff --git a/services/s3/common/src/aws/sdk/kotlin/services/s3/internal/GetBucketLocationOperationDeserializer.kt b/services/s3/common/src/aws/sdk/kotlin/services/s3/internal/GetBucketLocationOperationDeserializer.kt
index 9e75b7a55a2..6f4d50ffc9e 100644
--- a/services/s3/common/src/aws/sdk/kotlin/services/s3/internal/GetBucketLocationOperationDeserializer.kt
+++ b/services/s3/common/src/aws/sdk/kotlin/services/s3/internal/GetBucketLocationOperationDeserializer.kt
@@ -18,7 +18,7 @@ import aws.smithy.kotlin.runtime.serde.xml.xmlStreamReader
 internal class GetBucketLocationOperationDeserializer : HttpDeserialize<GetBucketLocationResponse> {
 
     override suspend fun deserialize(context: ExecutionContext, response: HttpResponse): GetBucketLocationResponse {
-        val builder = GetBucketLocationResponse.builder()
+        val builder = GetBucketLocationResponse.Builder()
 
         val payload = response.body.readAll()
         if (payload != null) {
@@ -28,7 +28,7 @@ internal class GetBucketLocationOperationDeserializer : HttpDeserialize<GetBucke
     }
 }
 
-private fun deserializeGetBucketLocationOperationBody(builder: GetBucketLocationResponse.DslBuilder, payload: ByteArray) {
+private fun deserializeGetBucketLocationOperationBody(builder: GetBucketLocationResponse.Builder, payload: ByteArray) {
     val dom = parseDom(xmlStreamReader(payload))
     check(dom.name.local == "LocationConstraint") { "Expected top-level tag of 'LocationConstraint' but found ${dom.name}." }
     val rawLocationConstraint = checkNotNull(dom.text) { "Did not receive a value for 'LocationConstraint' in response." }