diff --git a/configure.ac b/configure.ac
index 2f9f9390af..573083f483 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl Process with autoconf to generate configure script   -*- sh -*-
 
-AC_INIT(LyX,1.6.4.1,[lyx-devel@lists.lyx.org],[lyx])
+AC_INIT(LyX,1.6.5svn,[lyx-devel@lists.lyx.org],[lyx])
 # Use ISO format only. The frontend needs to parse this
 AC_SUBST(LYX_DATE, ["2009-08-31"])
 AC_PREREQ(2.52)