diff --git a/src/jrd/met.epp b/src/jrd/met.epp
index 53f7d6f592..24d656f239 100644
--- a/src/jrd/met.epp
+++ b/src/jrd/met.epp
@@ -4219,7 +4219,7 @@ static DSqlCacheItem* get_dsql_cache_item(thread_db* tdbb, int type, const Fireb
 	{
 		item->obsolete = false;
 		item->locked = false;
-		item->lock = FB_NEW_RPT(*dbb->dbb_permanent, key.length()) Lock();
+		item->lock = FB_NEW_RPT(*attachment->att_pool, key.length()) Lock();
 
 		item->lock->lck_type = LCK_dsql_cache;
 		item->lock->lck_owner_handle = LCK_get_owner_handle(tdbb, item->lock->lck_type);