diff --git a/headers/private/kernel/disk_device_manager/KPartition.h b/headers/private/kernel/disk_device_manager/KPartition.h
index 4dbda759f8..dfa249c3d0 100644
--- a/headers/private/kernel/disk_device_manager/KPartition.h
+++ b/headers/private/kernel/disk_device_manager/KPartition.h
@@ -106,6 +106,9 @@ public:
 	void SetVolumeID(dev_t volumeID);
 	dev_t VolumeID() const;
 
+	void SetMountCookie(void *cookie);
+	void *MountCookie() const;
+
 	virtual status_t Mount(uint32 mountFlags, const char *parameters);
 	virtual status_t Unmount();
 
diff --git a/headers/private/kernel/disk_device_manager/disk_device_manager.h b/headers/private/kernel/disk_device_manager/disk_device_manager.h
index 7d7c4d7465..6342af1c9b 100644
--- a/headers/private/kernel/disk_device_manager/disk_device_manager.h
+++ b/headers/private/kernel/disk_device_manager/disk_device_manager.h
@@ -28,6 +28,7 @@ typedef struct partition_data {
 	uint32			status;			// [sys]
 	uint32			flags;
 	dev_t			volume;			// [sys]
+	void			*mount_cookie;	// [sys] 
 	char			*name;			// max: B_OS_NAME_LENGTH
 	char			*content_name;	//
 	char			*type;			//
diff --git a/src/kernel/core/disk_device_manager/KPartition.cpp b/src/kernel/core/disk_device_manager/KPartition.cpp
index a76015939d..1e1e6ab270 100644
--- a/src/kernel/core/disk_device_manager/KPartition.cpp
+++ b/src/kernel/core/disk_device_manager/KPartition.cpp
@@ -49,6 +49,7 @@ KPartition::KPartition(partition_id id)
 	fPartitionData.status = B_PARTITION_UNRECOGNIZED;
 	fPartitionData.flags = B_PARTITION_BUSY | B_PARTITION_DESCENDANT_BUSY;
 	fPartitionData.volume = -1;
+	fPartitionData.mount_cookie = NULL;
 	fPartitionData.name = NULL;
 	fPartitionData.content_name = NULL;
 	fPartitionData.type = NULL;
@@ -503,6 +504,20 @@ KPartition::VolumeID() const
 	return fPartitionData.volume;
 }
 
+// SetMountCookie
+void
+KPartition::SetMountCookie(void *cookie)
+{
+	fPartitionData.mount_cookie = cookie;
+}
+
+// MountCookie
+void *
+KPartition::MountCookie() const
+{
+	return fPartitionData.mount_cookie;
+}
+
 // Mount
 status_t
 KPartition::Mount(uint32 mountFlags, const char *parameters)