diff --git a/runtime/errors.go b/runtime/errors.go
index 7d7a9b22415..0d3cb3bf3ca 100644
--- a/runtime/errors.go
+++ b/runtime/errors.go
@@ -63,8 +63,8 @@ var (
 )
 
 type errorBody struct {
-	Error string `json:"error"`
-	Code  int    `json:"code"`
+	Error string `protobuf:"bytes,1,name=error" json:"error"`
+	Code  int    `protobuf:"bytes,2,name=code" json:"code"`
 }
 
 //Make this also conform to proto.Message for builtin JSONPb Marshaler