diff --git a/advanced/index.php b/advanced/index.php
index 0f22908f..5503d604 100644
--- a/advanced/index.php
+++ b/advanced/index.php
@@ -103,7 +103,7 @@ $bpAskAdmin = !empty($svEmail) ? '<a href="mailto:'.$svEmail.'?subject=Site Bloc
 
 // Determine if at least one block list has been generated
 $blocklistglob = glob("/etc/pihole/list.0.*.domains");
-if ($blocklistglob = "") {
+if($blocklistglob === array()) {
     die("[ERROR] There are no domain lists generated lists within <code>/etc/pihole/</code>! Please update gravity by running <code>pihole -g</code>, or repair Pi-hole using <code>pihole -r</code>.");
 }