diff --git a/code/extensions/SiteTreeContentReview.php b/code/extensions/SiteTreeContentReview.php
index 6b0654d..2ec8c38 100644
--- a/code/extensions/SiteTreeContentReview.php
+++ b/code/extensions/SiteTreeContentReview.php
@@ -454,7 +454,10 @@ class SiteTreeContentReview extends DataExtension implements PermissionProvider
 
         $options = $this->getOptions();
 
-        if (!$options || !$options->hasExtension($this->class)) {
+        if (!$options
+            // Options can be a SiteConfig with different extension applied
+            || (!$options->hasExtension($this->class) && !$options->hasExtension('ContentReviewDefaultSettings'))
+        ) {
             return false;
         }
 
diff --git a/tests/SiteTreeContentReviewTest.php b/tests/SiteTreeContentReviewTest.php
index cdddcd0..fbdb9d6 100644
--- a/tests/SiteTreeContentReviewTest.php
+++ b/tests/SiteTreeContentReviewTest.php
@@ -313,4 +313,25 @@ class SiteTreeContentReviewTest extends ContentReviewBaseTest
 
         SS_Datetime::clear_mock_now();
     }
+
+    public function testSiteConfigSettingsAreUsedAsDefaults()
+    {
+        SS_Datetime::set_mock_now("2020-03-01 12:00:00");
+
+        /** @var Member $author */
+        $author = $this->objFromFixture('Member', '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));
+
+        SS_Datetime::clear_mock_now();
+    }
 }