diff --git a/DirectVolume.h b/DirectVolume.h
index ad1b386..de1ed8b 100644
--- a/DirectVolume.h
+++ b/DirectVolume.h
@@ -33,6 +33,9 @@
     int            mDiskMajor;
     int            mDiskMinor;
     int            mPartMinors[MAX_PARTITIONS];
+    int            mOrigDiskMajor;
+    int            mOrigDiskMinor;
+    int            mOrigPartMinors[MAX_PARTITIONS];
     int            mDiskNumParts;
     unsigned char  mPendingPartMap;
     int            mIsDecrypted;
@@ -55,6 +58,7 @@
 protected:
     int getDeviceNodes(dev_t *devs, int max);
     int updateDeviceInfo(char *new_path, int new_major, int new_minor);
+    virtual void revertDeviceInfo(void);
     int isDecrypted() { return mIsDecrypted; }
     int getFlags() { return mFlags; }