diff --git a/configure.ac b/configure.ac
index 08b10fb..6695913 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 m4_define(mt_major_version, 1)
 m4_define(mt_minor_version, 23)
 m4_define(mt_micro_version, 0)
-m4_define(mt_version, mt_major_version.mt_minor_version).mt_micro_version)
+m4_define(mt_version, mt_major_version.mt_minor_version.mt_micro_version)
 
 m4_define(mt_api_version, 0)