diff --git a/rslib/src/sched/reviews.rs b/rslib/src/sched/reviews.rs
index 1d5b4c945..160a23faa 100644
--- a/rslib/src/sched/reviews.rs
+++ b/rslib/src/sched/reviews.rs
@@ -40,7 +40,7 @@ impl Collection {
             for mut card in col.storage.all_searched_cards()? {
                 let original = card.clone();
                 let interval = distribution.sample(&mut rng);
-                col.log_manually_scheduled_review(&card, usn, interval)?;
+                col.log_manually_scheduled_review(&card, usn, interval.max(1))?;
                 card.schedule_as_review(interval, today);
                 col.update_card(&mut card, &original, usn)?;
             }