diff --git a/extensions/tags/src/Search/Filter/TagFilter.php b/extensions/tags/src/Search/Filter/TagFilter.php
index 2446cf5025..5c82c6bfde 100644
--- a/extensions/tags/src/Search/Filter/TagFilter.php
+++ b/extensions/tags/src/Search/Filter/TagFilter.php
@@ -43,6 +43,8 @@ public function filter(SearchState $state, string|array $value, bool $negate): v
 
     protected function constrain(Builder $query, string|array $rawSlugs, bool $negate, User $actor): void
     {
+        $rawSlugs = (array) $rawSlugs;
+
         $inputSlugs = $this->asStringArray($rawSlugs);
 
         foreach ($inputSlugs as $orSlugs) {