diff --git a/includes/specials/SpecialProtectedpages.php b/includes/specials/SpecialProtectedpages.php
index 7554e37..35dafd4 100644
--- a/includes/specials/SpecialProtectedpages.php
+++ b/includes/specials/SpecialProtectedpages.php
@@ -549,7 +549,7 @@ class ProtectedPagesPager extends TablePager {
 			'join_conds' => array(
 				'log_search' => array(
 					'LEFT JOIN', array(
-						'ls_field' => 'pr_id', 'ls_value = pr_id'
+						'ls_field' => 'pr_id', "ls_value = 'pr_id'"
 					)
 				),
 				'logging' => array(