diff --git a/headers/private/kernel/disk_device_manager/KFileSystem.h b/headers/private/kernel/disk_device_manager/KFileSystem.h
index ae26d26edc..000a30fd1e 100644
--- a/headers/private/kernel/disk_device_manager/KFileSystem.h
+++ b/headers/private/kernel/disk_device_manager/KFileSystem.h
@@ -11,16 +11,13 @@
 namespace BPrivate {
 namespace DiskDevice {
 
-class KFileSystem {
+class KFileSystem : public KDiskSystem {
+public:
 	KFileSystem(const char *name);
 	virtual ~KFileSystem();
 
 	virtual bool IsFileSystem() const;
 
-	virtual status_t Load();		// load/unload -- can be nested
-	virtual status_t Unload();		//
-	virtual bool IsLoaded() const;
-
 	// Scanning
 
 	virtual float Identify(KPartition *partition, void **cookie);
@@ -60,6 +57,9 @@ class KFileSystem {
 										  const char *parameters,
 										  KDiskDeviceJob *job);
 
+protected:
+	virtual status_t LoadModule();
+	virtual void UnloadModule();
 };
 
 } // namespace DiskDevice