diff --git a/weed/filer/reader_at_test.go b/weed/filer/reader_at_test.go
index 29bd47ea4..2066ba081 100644
--- a/weed/filer/reader_at_test.go
+++ b/weed/filer/reader_at_test.go
@@ -86,7 +86,7 @@ func testReadAt(t *testing.T, readerAt *ChunkReadAt, offset int64, size int, exp
 	if data == nil {
 		data = make([]byte, size)
 	}
-	n, err := readerAt.doReadAt(data, offset)
+	n, _, err := readerAt.doReadAt(data, offset)
 
 	if expectedN != n {
 		t.Errorf("unexpected read size: %d, expect: %d", n, expectedN)