diff --git a/smithy-aws-traits/src/main/resources/META-INF/smithy/aws.protocols.smithy b/smithy-aws-traits/src/main/resources/META-INF/smithy/aws.protocols.smithy
index 5099667c77c..577fe722391 100644
--- a/smithy-aws-traits/src/main/resources/META-INF/smithy/aws.protocols.smithy
+++ b/smithy-aws-traits/src/main/resources/META-INF/smithy/aws.protocols.smithy
@@ -32,7 +32,7 @@ structure awsJson1_1 with [HttpConfiguration] {}
 
 /// Contains HTTP protocol configuration for HTTP-based protocols.
 @private
-@mixin
+@mixin(localTraits: [private])
 structure HttpConfiguration {
     /// The priority ordered list of supported HTTP protocol versions.
     http: StringList