diff --git a/includes/Views/AbuseFilterViewHistory.php b/includes/Views/AbuseFilterViewHistory.php
index 8b9abbbe3..16b87565a 100644
--- a/includes/Views/AbuseFilterViewHistory.php
+++ b/includes/Views/AbuseFilterViewHistory.php
@@ -11,7 +11,7 @@ class AbuseFilterViewHistory extends AbuseFilterView {
 		$filter = $this->mFilter;
 
 		if ( $filter ) {
-			$out->setPageTitle( $this->msg( 'abusefilter-history', $filter ) );
+			$out->setPageTitle( $this->msg( 'abusefilter-history' )->numParams( $filter ) );
 		} else {
 			$out->setPageTitle( $this->msg( 'abusefilter-filter-log' ) );
 		}
diff --git a/includes/Views/AbuseFilterViewRevert.php b/includes/Views/AbuseFilterViewRevert.php
index eccddea0b..f8c07bd35 100644
--- a/includes/Views/AbuseFilterViewRevert.php
+++ b/includes/Views/AbuseFilterViewRevert.php
@@ -20,8 +20,8 @@ class AbuseFilterViewRevert extends AbuseFilterView {
 			return;
 		}
 
-		$out->addWikiMsg( 'abusefilter-revert-intro', $filter );
-		$out->setPageTitle( $this->msg( 'abusefilter-revert-title', $filter ) );
+		$out->addWikiMsg( 'abusefilter-revert-intro', Message::numParam( $filter ) );
+		$out->setPageTitle( $this->msg( 'abusefilter-revert-title' )->numParams( $filter ) );
 
 		// First, the search form.
 		$searchFields = [];