diff --git a/configure.ac b/configure.ac
index 833dad8a..3bbb7edc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,7 +27,7 @@ AM_INIT_AUTOMAKE([dist-bzip2])
 # versioning, as we hopefully don't have updates for each version;
 # also, this has nothing to do with the version of the Xapian library
 #
-AC_DEFINE(MU_XAPIAN_DB_VERSION,["6.99"], [Schema version of the database])
+AC_DEFINE(MU_XAPIAN_DB_VERSION,["6.999"], [Schema version of the database])
 
 LT_INIT # don't use AC_PROG_LIBTOOL anymore