diff --git a/pkg/migrate/types/migrateable.go b/pkg/migrate/types/migrateable.go
index 3445a7bc9..5c295592d 100644
--- a/pkg/migrate/types/migrateable.go
+++ b/pkg/migrate/types/migrateable.go
@@ -1,6 +1,8 @@
 package types
 
-import "os"
+import (
+	"io"
+)
 
 var (
 	SfDateTime = "2006-01-02 15:04:05"
@@ -11,8 +13,6 @@ type (
 		Name string
 		Path string
 
-		Source *os.File
-		// @todo?
-		Mapping *os.File
+		Source io.ReadSeeker
 	}
 )