diff --git a/src/jrd/Monitoring.cpp b/src/jrd/Monitoring.cpp
index 232b169b04..91b00d6593 100644
--- a/src/jrd/Monitoring.cpp
+++ b/src/jrd/Monitoring.cpp
@@ -1220,8 +1220,8 @@ void Monitoring::dumpAttachment(thread_db* tdbb, const Attachment* attachment, b
 		 transaction = transaction->tra_next)
 	{
 		for (jrd_req* request = transaction->tra_requests;
-			 request && (request->req_flags & req_active);
-			 request = request->req_caller)
+			request && (request->req_flags & req_active) && (request->req_transaction == transaction);
+			request = request->req_caller)
 		{
 			request->adjustCallerStats();