diff --git a/kernel/model/flashcard.go b/kernel/model/flashcard.go
index 6e305f9d9..1884dd230 100644
--- a/kernel/model/flashcard.go
+++ b/kernel/model/flashcard.go
@@ -918,7 +918,7 @@ func getDeckDueCards(deck *riff.Deck, reviewedCardIDs []string) (ret []riff.Card
 			}
 		}
 
-		if !gulu.Str.Contains(c.ID(), reviewedCardIDs) {
+		if 0 < len(reviewedCardIDs) && !gulu.Str.Contains(c.ID(), reviewedCardIDs) {
 			continue
 		}