diff --git a/codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/protocol/aws/AwsJson10ProtocolGenerator.java b/codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/protocol/aws/AwsJson10ProtocolGenerator.java
index 3d97314c..1edc8ce0 100644
--- a/codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/protocol/aws/AwsJson10ProtocolGenerator.java
+++ b/codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/protocol/aws/AwsJson10ProtocolGenerator.java
@@ -71,7 +71,7 @@ public void generateSharedSerializers(GenerationContext context, GoWriter writer
 
     @Override
     public void generateResponseDeserializers(GenerationContext context) {
-        GoWriter writer = context.getWriter().get();
+        var writer = context.getWriter().get();
         var model = context.getModel();
         var ops = model.getOperationShapes();
         for (var op : ops) {