diff --git a/cryptfs.h b/cryptfs.h
index 32f1724..10b3b7d 100644
--- a/cryptfs.h
+++ b/cryptfs.h
@@ -53,6 +53,7 @@
 extern "C" {
 #endif
   int cryptfs_check_passwd(char *pw);
+  int cryptfs_restart(void);
   int cryptfs_enable(char *flag, char *passwd);
 #ifdef __cplusplus
 }