diff --git a/utils.go b/utils.go
index 097f0b02..25e3a4f9 100644
--- a/utils.go
+++ b/utils.go
@@ -3,6 +3,7 @@ package gorm
 import (
 	"bytes"
 	"strings"
+	"sync"
 )
 
 // Copied from golint