diff --git a/xorriso/xorriso.h b/xorriso/xorriso.h
index ddc0c29c..a4db462c 100644
--- a/xorriso/xorriso.h
+++ b/xorriso/xorriso.h
@@ -403,6 +403,9 @@ int Xorriso_option_rmi(struct XorrisO *xorriso, int argc, char **argv,
 */
 int Xorriso_option_rollback(struct XorrisO *xorriso, int flag);
 
+/* Option -session_log */
+int Xorriso_option_session_log(struct XorrisO *xorriso, char *path, int flag);
+
 /* Option -speed */
 int Xorriso_option_speed(struct XorrisO *xorriso, char *speed, int flag);
 
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index be19c86a..3a25b196 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2008.04.05.112055"
+#define Xorriso_timestamP "2008.04.07.185727"