diff --git a/lustre/autoconf/lustre-version.ac b/lustre/autoconf/lustre-version.ac
index 5fd2e2f9d666062cea6412aceaf52c202f66bbdc..3827425ac6ba4472b31d8374033b1c643c320778 100644
--- a/lustre/autoconf/lustre-version.ac
+++ b/lustre/autoconf/lustre-version.ac
@@ -1,7 +1,7 @@
 m4_define([LUSTRE_MAJOR],[1])
 m4_define([LUSTRE_MINOR],[6])
 m4_define([LUSTRE_PATCH],[6])
-m4_define([LUSTRE_FIX],[50])
+m4_define([LUSTRE_FIX],[51])
 # Note: we're starting prerelease versions at 50 this time.
 
 dnl # don't forget to update the service tags info