diff --git a/src/Actions/DuplicateEntry.php b/src/Actions/DuplicateEntry.php
index 2cf370f25cf..d5b063a5180 100644
--- a/src/Actions/DuplicateEntry.php
+++ b/src/Actions/DuplicateEntry.php
@@ -162,7 +162,7 @@ protected function generateTitleAndSlug(Entry $entry, $attempt = 1)
         $slug .= '-'.$attempt;
 
         // If the slug we've just built already exists, we'll try again, recursively.
-        if ($entry->collection()->queryEntries()->where('locale', $entry->locale())->where('slug', $slug)->count()) {
+        if ($entry->collection()->queryEntries()->where('site', $entry->locale())->where('slug', $slug)->count()) {
             [$title, $slug] = $this->generateTitleAndSlug($entry, $attempt + 1);
         }