diff --git a/src/Extensions/SiteTreeContentReview.php b/src/Extensions/SiteTreeContentReview.php
index 5370a40..69e33f8 100644
--- a/src/Extensions/SiteTreeContentReview.php
+++ b/src/Extensions/SiteTreeContentReview.php
@@ -488,7 +488,10 @@ class SiteTreeContentReview extends DataExtension implements PermissionProvider
             return false;
         }
 
-        if (!$options || !$options->hasExtension(__CLASS__)) {
+        if (!$options
+            // Options can be a SiteConfig with different extension applied
+            || (!$options->hasExtension(__CLASS__) && !$options->hasExtension(ContentReviewDefaultSettings::class))
+        ) {
             return false;
         }
 
diff --git a/tests/php/SiteTreeContentReviewTest.php b/tests/php/SiteTreeContentReviewTest.php
index 8960e97..46075ae 100644
--- a/tests/php/SiteTreeContentReviewTest.php
+++ b/tests/php/SiteTreeContentReviewTest.php
@@ -330,4 +330,25 @@ class SiteTreeContentReviewTest extends ContentReviewBaseTest
 
         DBDatetime::clear_mock_now();
     }
+
+    public function testSiteConfigSettingsAreUsedAsDefaults()
+    {
+        DBDatetime::set_mock_now("2020-03-01 12:00:00");
+
+        /** @var Member $author */
+        $author = $this->objFromFixture(Member::class, 'editor');
+
+        /** @var SiteConfig $siteConfig */
+        $siteConfig = SiteConfig::current_site_config();
+
+        // Set the author to a default user for reviewing
+        $siteConfig->OwnerUsers()->add($author);
+
+        $emptyPage = new Page;
+        $emptyPage->NextReviewDate = '2020-02-20 12:00:00';
+
+        $this->assertTrue($emptyPage->canBeReviewedBy($author));
+
+        DBDatetime::clear_mock_now();
+    }
 }