diff --git a/cryptfs.h b/cryptfs.h
index c34410a..d630479 100644
--- a/cryptfs.h
+++ b/cryptfs.h
@@ -172,6 +172,7 @@
   struct crypt_persist_entry persist_entry[0];
 };
 
+// TODO: remove this deprecated struct
 struct volume_info {
    unsigned int size;
    unsigned int flags;
@@ -232,10 +233,9 @@
   int cryptfs_enable(char *flag, int type, char *passwd, int allow_reboot);
   int cryptfs_changepw(int type, const char *newpw);
   int cryptfs_enable_default(char *flag, int allow_reboot);
-  int cryptfs_setup_volume(const char *label, int major, int minor,
-                           char *crypto_dev_path, unsigned int max_pathlen,
-                           int *new_major, int *new_minor);
-  int cryptfs_revert_volume(const char *label);
+  int cryptfs_setup_ext_volume(const char* label, const char* real_blkdev,
+          const unsigned char* key, int keysize, char* out_crypto_blkdev);
+  int cryptfs_revert_ext_volume(const char* label);
   int cryptfs_getfield(const char *fieldname, char *value, int len);
   int cryptfs_setfield(const char *fieldname, const char *value);
   int cryptfs_mount_default_encrypted(void);