diff --git a/storage/completion.go b/storage/completion.go
index 3d2e4d77..383a1d92 100644
--- a/storage/completion.go
+++ b/storage/completion.go
@@ -8,7 +8,7 @@ import (
 
 type PieceCompletionGetSetter interface {
 	Get(metainfo.PieceKey) (Completion, error)
-	Set(metainfo.PieceKey, bool) error
+	Set(_ metainfo.PieceKey, complete bool) error
 }
 
 // Implementations track the completion of pieces. It must be concurrent-safe.