diff --git a/code/extensions/BlogPostFilter.php b/code/extensions/BlogPostFilter.php
index 1795bc8..3f70cb6 100644
--- a/code/extensions/BlogPostFilter.php
+++ b/code/extensions/BlogPostFilter.php
@@ -18,7 +18,7 @@ class BlogPostFilter extends DataExtension
     {
         $stage = Versioned::current_stage();
 
-        if (Controller::curr() instanceof LeftAndMain) {
+        if (Controller::has_curr() && Controller::curr() instanceof LeftAndMain) {
             return;
         }