diff --git a/kernel/model/file.go b/kernel/model/file.go
index aa08126c1..16eae65bf 100644
--- a/kernel/model/file.go
+++ b/kernel/model/file.go
@@ -152,7 +152,7 @@ func SearchDocsByKeyword(keyword string, flashcard bool) (ret []map[string]strin
 	var deck *riff.Deck
 	var deckBlockIDs []string
 	if flashcard {
-		deck := Decks[builtinDeckID]
+		deck = Decks[builtinDeckID]
 		if nil == deck {
 			return
 		}