diff --git a/Contributors.asciidoc b/Contributors.asciidoc
index 9a40da4a..1ed16483 100644
--- a/Contributors.asciidoc
+++ b/Contributors.asciidoc
@@ -56,6 +56,7 @@ CONTRIBUTOR LIST
 |===
 |Ben Rubson                                                     |ben.rubson at gmail.com
 |Bill Zissimopoulos                                             |billziss at navimatics.com
+|Colin Atkinson (Atakama, https://atakama.com)                  |colin at atakama.com
 |Francois Karam (KS2, http://www.ks2.fr)                        |francois.karam at ks2.fr
 |Fritz Elfert                                                   |fritz-github at fritz-elfert.de
 |John Oberschelp                                                |john at oberschelp.net
diff --git a/inc/winfsp/winfsp.hpp b/inc/winfsp/winfsp.hpp
index d3537b38..6b73623a 100644
--- a/inc/winfsp/winfsp.hpp
+++ b/inc/winfsp/winfsp.hpp
@@ -612,6 +612,14 @@ public:
     {
         _VolumeParams.PassQueryDirectoryPattern = !!PassQueryDirectoryPattern;
     }
+    BOOLEAN FlushAndPurgeOnCleanup()
+    {
+        return _VolumeParams.FlushAndPurgeOnCleanup;
+    }
+    VOID SetFlushAndPurgeOnCleanup(BOOLEAN FlushAndPurgeOnCleanup)
+    {
+        _VolumeParams.FlushAndPurgeOnCleanup = !!FlushAndPurgeOnCleanup;
+    }
     PWSTR Prefix()
     {
         return _VolumeParams.Prefix;
diff --git a/tst/passthrough-cpp/passthrough-cpp.cpp b/tst/passthrough-cpp/passthrough-cpp.cpp
index 4b132639..55454a3b 100644
--- a/tst/passthrough-cpp/passthrough-cpp.cpp
+++ b/tst/passthrough-cpp/passthrough-cpp.cpp
@@ -268,6 +268,7 @@ NTSTATUS Ptfs::Init(PVOID Host0)
     Host->SetPassQueryDirectoryPattern(TRUE);
     Host->SetVolumeCreationTime(_CreationTime);
     Host->SetVolumeSerialNumber(0);
+    Host->SetFlushAndPurgeOnCleanup(TRUE);
     return STATUS_SUCCESS;
 }