diff --git a/core/coreiface/unixfs.go b/core/coreiface/unixfs.go
index acc3b960c..92168503e 100644
--- a/core/coreiface/unixfs.go
+++ b/core/coreiface/unixfs.go
@@ -2,10 +2,10 @@ package iface
 
 import (
 	"context"
-	"io"
 
 	options "github.com/ipfs/go-ipfs/core/coreapi/interface/options"
 
+	files "gx/ipfs/QmSP88ryZkHSRn1fnngAaV2Vcn63WUJzAavnRM9CVdU1Ky/go-ipfs-cmdkit/files"
 	ipld "gx/ipfs/QmdDXJs4axxefSPgK6Y1QhpJWKuDPnGJiqgq4uncb4rFHL/go-ipld-format"
 )
 
@@ -13,7 +13,7 @@ import (
 // NOTE: This API is heavily WIP, things are guaranteed to break frequently
 type UnixfsAPI interface {
 	// Add imports the data from the reader into merkledag file
-	Add(context.Context, io.ReadCloser, ...options.UnixfsAddOption) (ResolvedPath, error)
+	Add(context.Context, files.File, ...options.UnixfsAddOption) (ResolvedPath, error)
 
 	// Cat returns a reader for the file
 	Cat(context.Context, Path) (Reader, error)