diff --git a/anki/deck.py b/anki/deck.py
index 85b752240..c60de84b6 100644
--- a/anki/deck.py
+++ b/anki/deck.py
@@ -1764,6 +1764,8 @@ order by priority desc, combinedDue""")
                 deck.s.statement("""
     alter table cards add column isDue boolean not null default 0""")
                 deck.s.statement("""
+    alter table cards add column relativeDelay float not null default 0.0""")
+                deck.s.statement("""
     alter table cards add column type integer not null default 0""")
                 deck.s.statement("""
     alter table cards add column combinedDue float not null default 0""")