diff --git a/src/jrd/cch.cpp b/src/jrd/cch.cpp
index e446c75786..c966e4ea7e 100644
--- a/src/jrd/cch.cpp
+++ b/src/jrd/cch.cpp
@@ -1278,7 +1278,7 @@ void CCH_flush(thread_db* tdbb, USHORT flush_flag, TraNumber tra_number)
 			PIO_flush(tdbb, shadow->sdw_file);
 
 		BackupManager* bm = dbb->dbb_backup_manager;
-		if (!bm->isShutDown())
+		if (bm && !bm->isShutDown())
 		{
 			BackupManager::StateReadGuard stateGuard(tdbb);
 			const int backup_state = bm->getState();