diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 47a7528be..96b78b321 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -132,6 +132,7 @@ shunlog <github.com/shunlog>
 Derek Dang <github.com/derekdang/>
 Luc Mcgrady <github.com/Luc-Mcgrady>
 Kehinde Adeleke <adelekekehinde06@gmail.com>
+Marko Juhanne <github.com/mjuhanne>
 
 ********************
 
diff --git a/qt/aqt/reviewer.py b/qt/aqt/reviewer.py
index 89f1d05de..96027fbf0 100644
--- a/qt/aqt/reviewer.py
+++ b/qt/aqt/reviewer.py
@@ -149,6 +149,7 @@ class Reviewer:
         self._card_info = ReviewerCardInfo(self.mw)
         self._previous_card_info = PreviousReviewerCardInfo(self.mw)
         self._states_mutated = True
+        self._reps: int = None
         hooks.card_did_leech.append(self.onLeech)
 
     def show(self) -> None:
@@ -160,7 +161,7 @@ class Reviewer:
         self.web.set_bridge_command(self._linkHandler, self)
         self.bottom.web.set_bridge_command(self._linkHandler, ReviewerBottomBar(self))
         self._state_mutation_js = self.mw.col.get_config("cardStateCustomizer")
-        self._reps: int = None
+        self._reps = None
         self._refresh_needed = RefreshNeeded.QUEUES
         self.refresh_if_needed()