diff --git a/configure.ac b/configure.ac
index 479e84bed..67f05aae4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-AC_INIT([libguestfs],[1.0.39])
+AC_INIT([libguestfs],[1.0.40])
 AM_INIT_AUTOMAKE
 
 AC_CONFIG_MACRO_DIR([m4])