diff --git a/lustre/autoconf/lustre-version.ac b/lustre/autoconf/lustre-version.ac
index d463e4700bc1cd06816f8f5dca47f96376d6018b..489093c638a974aa1a63fe44a840e901bcfcf686 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],[4])
-m4_define([LUSTRE_FIX],[51])
+m4_define([LUSTRE_FIX],[52])
 # Note: we're starting prerelease versions at 50 this time.
 
 dnl # liblustre delta is 0.0.1.32 , next version with fixes is ok, but