diff --git a/staging/src/k8s.io/apimachinery/pkg/runtime/types.go b/staging/src/k8s.io/apimachinery/pkg/runtime/types.go
index 3d3ebe5f9d1..2f0b6c9e55b 100644
--- a/staging/src/k8s.io/apimachinery/pkg/runtime/types.go
+++ b/staging/src/k8s.io/apimachinery/pkg/runtime/types.go
@@ -95,7 +95,7 @@ type RawExtension struct {
 	// Raw is the underlying serialization of this object.
 	//
 	// TODO: Determine how to detect ContentType and ContentEncoding of 'Raw' data.
-	Raw []byte `protobuf:"bytes,1,opt,name=raw"`
+	Raw []byte `json:"-" protobuf:"bytes,1,opt,name=raw"`
 	// Object can hold a representation of this extension - useful for working with versioned
 	// structs.
 	Object Object `json:"-"`