diff --git a/Fat.h b/Fat.h
index e5d76e3..ab16a7f 100644
--- a/Fat.h
+++ b/Fat.h
@@ -23,7 +23,8 @@
 public:
     static int check(const char *fsPath);
     static int doMount(const char *fsPath, const char *mountPoint, bool ro,
-                       bool remount);
+                       bool remount, int ownerUid, int ownerGid, int permMask,
+                       bool createLost);
     static int format(const char *fsPath);
 };