diff --git a/VolumeManager.h b/VolumeManager.h
index ffba5e6..11b5ed3 100644
--- a/VolumeManager.h
+++ b/VolumeManager.h
@@ -62,6 +62,11 @@
     bool                   mUsbConnected;
     bool                   mDebug;
 
+    // for adjusting /proc/sys/vm/dirty_ratio when UMS is active
+    int                    mUmsSharingCount;
+    int                    mSavedDirtyRatio;
+    int                    mUmsDirtyRatio;
+
 public:
     virtual ~VolumeManager();