diff --git a/Ext4Crypt.h b/Ext4Crypt.h
index 2dcc197..e90167b 100644
--- a/Ext4Crypt.h
+++ b/Ext4Crypt.h
@@ -38,4 +38,5 @@
 bool e4crypt_prepare_user_storage(const char* volume_uuid, userid_t user_id, int serial, int flags);
 bool e4crypt_destroy_user_storage(const char* volume_uuid, userid_t user_id, int flags);
 
+bool e4crypt_secdiscard(const char* path);
 __END_DECLS