diff --git a/lustre/autoconf/lustre-version.ac b/lustre/autoconf/lustre-version.ac
index c2f70501fd09627b023cab37ddd0d5633a6c9c4f..679eaa01eae2a86b624d67fe1416fa2a8a4e3b00 100644
--- a/lustre/autoconf/lustre-version.ac
+++ b/lustre/autoconf/lustre-version.ac
@@ -1,6 +1,6 @@
 m4_define([LUSTRE_MAJOR],[1])
 m4_define([LUSTRE_MINOR],[9])
-m4_define([LUSTRE_PATCH],[80])
+m4_define([LUSTRE_PATCH],[90])
 m4_define([LUSTRE_FIX],[0])
 
 dnl # don't forget to update the service tags info