diff --git a/configure.ac b/configure.ac
index 91a97558e..737e5e395 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,9 +30,9 @@ m4_define(glib_configure_ac)
 # <mclasen> on the unstable (ie master), interface age = 0
 
 m4_define([glib_major_version], [2])
-m4_define([glib_minor_version], [50])
-m4_define([glib_micro_version], [1])
-m4_define([glib_interface_age], [1])
+m4_define([glib_minor_version], [51])
+m4_define([glib_micro_version], [0])
+m4_define([glib_interface_age], [0])
 m4_define([glib_binary_age],
           [m4_eval(100 * glib_minor_version + glib_micro_version)])
 m4_define([glib_version],