diff --git a/.changes/34157ab1-1bd3-4ac8-9845-661c4709475b.json b/.changes/34157ab1-1bd3-4ac8-9845-661c4709475b.json
new file mode 100644
index 00000000000..4c79c273b2e
--- /dev/null
+++ b/.changes/34157ab1-1bd3-4ac8-9845-661c4709475b.json
@@ -0,0 +1,8 @@
+{
+    "id": "34157ab1-1bd3-4ac8-9845-661c4709475b",
+    "type": "bugfix",
+    "description": "Fix endpoint builtin bound to wrong config parameter",
+    "issues": [
+        "awslabs/aws-sdk-kotlin#1101"
+    ]
+}
\ No newline at end of file
diff --git a/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/protocols/endpoints/BindAwsEndpointBuiltins.kt b/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/protocols/endpoints/BindAwsEndpointBuiltins.kt
index 4344fefb4bd..4ef6c0ba76b 100644
--- a/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/protocols/endpoints/BindAwsEndpointBuiltins.kt
+++ b/codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/protocols/endpoints/BindAwsEndpointBuiltins.kt
@@ -53,7 +53,7 @@ fun renderBindAwsBuiltins(ctx: ProtocolGenerator.GenerationContext, writer: Kotl
                 "AWS::S3::Accelerate" -> renderBasicConfigBinding(writer, it, S3ClientConfigIntegration.EnableAccelerateProp.propertyName)
                 "AWS::S3::ForcePathStyle" -> renderBasicConfigBinding(writer, it, S3ClientConfigIntegration.ForcePathStyleProp.propertyName)
                 "AWS::S3::DisableMultiRegionAccessPoints" -> renderBasicConfigBinding(writer, it, S3ClientConfigIntegration.DisableMrapProp.propertyName)
-                "AWS::S3::UseArnRegion" -> renderBasicConfigBinding(writer, it, S3ClientConfigIntegration.DisableMrapProp.propertyName)
+                "AWS::S3::UseArnRegion" -> renderBasicConfigBinding(writer, it, S3ClientConfigIntegration.UseArnRegionProp.propertyName)
                 "AWS::S3Control::UseArnRegion" -> renderBasicConfigBinding(writer, it, S3ControlClientConfigIntegration.UseArnRegionProp.propertyName)
 
                 "SDK::Endpoint" ->