diff --git a/reactos/drivers/filesystems/msfs/msfs.c b/reactos/drivers/filesystems/msfs/msfs.c
index 2ebb4ba7fc4..5a34ac85f3c 100644
--- a/reactos/drivers/filesystems/msfs/msfs.c
+++ b/reactos/drivers/filesystems/msfs/msfs.c
@@ -67,7 +67,7 @@ DriverEntry(PDRIVER_OBJECT DriverObject,
     }
 
     /* initialize the device object */
-    DeviceObject->Flags = DO_DIRECT_IO;
+    DeviceObject->Flags |= DO_DIRECT_IO;
 
     /* initialize device extension */
     DeviceExtension = DeviceObject->DeviceExtension;
diff --git a/reactos/drivers/filesystems/msfs/msfs.h b/reactos/drivers/filesystems/msfs/msfs.h
index 61b654a9896..ad11bd56b30 100644
--- a/reactos/drivers/filesystems/msfs/msfs.h
+++ b/reactos/drivers/filesystems/msfs/msfs.h
@@ -76,16 +76,28 @@ typedef struct _MSFS_MESSAGE
 
 #define KeUnlockMutex(x) KeReleaseMutex(x, FALSE);
 
+DRIVER_DISPATCH MsfsCreate;
 NTSTATUS DEFAULTAPI MsfsCreate(PDEVICE_OBJECT DeviceObject, PIRP Irp);
+
+DRIVER_DISPATCH MsfsCreateMailslot;
 NTSTATUS DEFAULTAPI MsfsCreateMailslot(PDEVICE_OBJECT DeviceObject, PIRP Irp);
+
+DRIVER_DISPATCH MsfsClose;
 NTSTATUS DEFAULTAPI MsfsClose(PDEVICE_OBJECT DeviceObject, PIRP Irp);
 
+DRIVER_DISPATCH MsfsQueryInformation;
 NTSTATUS DEFAULTAPI MsfsQueryInformation(PDEVICE_OBJECT DeviceObject, PIRP Irp);
+
+DRIVER_DISPATCH MsfsSetInformation;
 NTSTATUS DEFAULTAPI MsfsSetInformation(PDEVICE_OBJECT DeviceObject, PIRP Irp);
 
+DRIVER_DISPATCH MsfsRead;
 NTSTATUS DEFAULTAPI MsfsRead(PDEVICE_OBJECT DeviceObject, PIRP Irp);
+
+DRIVER_DISPATCH MsfsWrite;
 NTSTATUS DEFAULTAPI MsfsWrite(PDEVICE_OBJECT DeviceObject, PIRP Irp);
 
+DRIVER_DISPATCH MsfsFileSystemControl;
 NTSTATUS DEFAULTAPI MsfsFileSystemControl(PDEVICE_OBJECT DeviceObject, PIRP Irp);
 
 NTSTATUS NTAPI