diff --git a/vendor/github.com/Shopify/sarama/response_header.go b/vendor/github.com/Shopify/sarama/response_header.go
index f3f4d27..7a75918 100644
--- a/vendor/github.com/Shopify/sarama/response_header.go
+++ b/vendor/github.com/Shopify/sarama/response_header.go
@@ -2,6 +2,9 @@
 
 import "fmt"
 
+const responseLengthSize = 4
+const correlationIDSize = 4
+
 type responseHeader struct {
 	length        int32
 	correlationID int32