diff --git a/build/VStudio/winfsp_dll.vcxproj b/build/VStudio/winfsp_dll.vcxproj
index b0788789..45c1bea2 100644
--- a/build/VStudio/winfsp_dll.vcxproj
+++ b/build/VStudio/winfsp_dll.vcxproj
@@ -35,6 +35,7 @@
     <ClInclude Include="..\..\src\dll\fuse3\library.h" />
     <ClInclude Include="..\..\src\dll\fuse\library.h" />
     <ClInclude Include="..\..\src\dll\library.h" />
+    <ClInclude Include="..\..\src\shared\ku\config.h" />
     <ClInclude Include="..\..\src\shared\ku\library.h" />
     <ClInclude Include="..\..\src\shared\um\minimal.h" />
   </ItemGroup>
diff --git a/build/VStudio/winfsp_dll.vcxproj.filters b/build/VStudio/winfsp_dll.vcxproj.filters
index 1fd13cd7..95efcf6a 100644
--- a/build/VStudio/winfsp_dll.vcxproj.filters
+++ b/build/VStudio/winfsp_dll.vcxproj.filters
@@ -86,6 +86,9 @@
     <ClInclude Include="..\..\src\shared\ku\library.h">
       <Filter>Source\shared\ku</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\shared\ku\config.h">
+      <Filter>Source\shared\ku</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\src\dll\library.c">
diff --git a/build/VStudio/winfsp_sys.vcxproj b/build/VStudio/winfsp_sys.vcxproj
index b62a7781..102649a2 100644
--- a/build/VStudio/winfsp_sys.vcxproj
+++ b/build/VStudio/winfsp_sys.vcxproj
@@ -193,6 +193,7 @@
   <ItemGroup>
     <ClInclude Include="..\..\inc\winfsp\fsctl.h" />
     <ClInclude Include="..\..\opt\fsext\inc\winfsp\fsext.h" />
+    <ClInclude Include="..\..\src\shared\ku\config.h" />
     <ClInclude Include="..\..\src\shared\ku\library.h" />
     <ClInclude Include="..\..\src\sys\driver.h" />
   </ItemGroup>
diff --git a/build/VStudio/winfsp_sys.vcxproj.filters b/build/VStudio/winfsp_sys.vcxproj.filters
index 7f71883d..f8e5bfe7 100644
--- a/build/VStudio/winfsp_sys.vcxproj.filters
+++ b/build/VStudio/winfsp_sys.vcxproj.filters
@@ -136,6 +136,9 @@
     <ClInclude Include="..\..\src\shared\ku\library.h">
       <Filter>Source\shared\ku</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\shared\ku\config.h">
+      <Filter>Source\shared\ku</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="..\..\src\sys\version.rc">
diff --git a/src/dll/library.h b/src/dll/library.h
index fa3f5ec5..d8582f8e 100644
--- a/src/dll/library.h
+++ b/src/dll/library.h
@@ -28,7 +28,7 @@
 #include <shared/um/minimal.h>
 #include <strsafe.h>
 
-#define FSP_CFG_REJECT_EARLY_IRP
+#include <shared/ku/config.h>
 
 #define LIBRARY_NAME                    "WinFsp"
 
diff --git a/src/shared/ku/config.h b/src/shared/ku/config.h
new file mode 100644
index 00000000..2e98009c
--- /dev/null
+++ b/src/shared/ku/config.h
@@ -0,0 +1,33 @@
+/**
+ * @file shared/ku/config.h
+ *
+ * Shared kernel/user configuration. This file is to be included by the
+ * FSD and DLL components ONLY!
+ *
+ * @copyright 2015-2020 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#ifndef WINFSP_SHARED_KU_CONFIG_H_INCLUDED
+#define WINFSP_SHARED_KU_CONFIG_H_INCLUDED
+
+/*
+ * Define the FSP_CFG_REJECT_EARLY_IRP macro to support the RejectIrpPriorToTransact0 flag.
+ */
+#define FSP_CFG_REJECT_EARLY_IRP
+
+#endif
diff --git a/src/sys/driver.h b/src/sys/driver.h
index 50ab13c1..1a78518d 100644
--- a/src/sys/driver.h
+++ b/src/sys/driver.h
@@ -33,9 +33,9 @@
 #include <winfsp/fsctl.h>
 #include <winfsp/fsext.h>
 
-#define FSP_CFG_REJECT_EARLY_IRP
+#include <shared/ku/config.h>
 
- /* disable warnings */
+/* disable warnings */
 #pragma warning(disable:4100)           /* unreferenced formal parameter */
 #pragma warning(disable:4200)           /* zero-sized array in struct/union */