diff --git a/src/Extensions/SiteTreeContentReview.php b/src/Extensions/SiteTreeContentReview.php
index 81cb82f..6869d66 100644
--- a/src/Extensions/SiteTreeContentReview.php
+++ b/src/Extensions/SiteTreeContentReview.php
@@ -662,6 +662,8 @@ class SiteTreeContentReview extends Extension implements PermissionProvider
 
         if (is_object($nextDate)) {
             $this->owner->NextReviewDate = $nextDate->getValue();
+        } elseif ($nextDate === false) {
+            $this->owner->NextReviewDate = null;
         } else {
             $this->owner->NextReviewDate = $nextDate;
         }