diff --git a/core/modules/block/src/Plugin/migrate/source/d6/BlockTranslation.php b/core/modules/block/src/Plugin/migrate/source/d6/BlockTranslation.php
index c1c0310..7e1b48a 100644
--- a/core/modules/block/src/Plugin/migrate/source/d6/BlockTranslation.php
+++ b/core/modules/block/src/Plugin/migrate/source/d6/BlockTranslation.php
@@ -23,7 +23,7 @@ public function query() {
       ->fields('b', ['bid', 'theme', 'title']);
     $query->addField('b', 'module', 'block_module');
     $query->addField('b', 'delta', 'block_delta');
-    $query->leftJoin('i18n_blocks', 'i18n', ('b.module = i18n.module AND b.delta = i18n.delta'));
+    $query->innerJoin('i18n_blocks', 'i18n', ('b.module = i18n.module AND b.delta = i18n.delta'));
     return $query;
   }