diff --git a/configure.in b/configure.in
index f86d58221..97b853b69 100644
--- a/configure.in
+++ b/configure.in
@@ -5,7 +5,7 @@ m4_define([metacity_minor_version], [25])
 # Fibonacci sequence for micro version numbering:
 # 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987
 m4_define([metacity_micro_version], [144])
-m4_define([mutter_version],[0.4])
+m4_define([mutter_version],[0.5])
 m4_define([metacity_version],
           [metacity_major_version.metacity_minor_version.metacity_micro_version~mutter_version])