diff --git a/src/NHibernate/Impl/SessionImpl.cs b/src/NHibernate/Impl/SessionImpl.cs
index 9a7120ae8b7..df759ac635d 100644
--- a/src/NHibernate/Impl/SessionImpl.cs
+++ b/src/NHibernate/Impl/SessionImpl.cs
@@ -1055,7 +1055,7 @@ public override bool AutoFlushIfRequired(ISet<string> querySpaces)
 		{
 			using (BeginProcess())
 			{
-				if (!ConnectionManager.IsInActiveTransaction)
+				if (IsClosed)
 				{
 					// do not auto-flush while outside a transaction
 					return false;