diff --git a/ChangeLog b/ChangeLog
index ef2daa4..15d87e6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+ver 3.31:
+	Don't optimize when debug is enabled.
+
 ver 3.30:
 	Add another company identifier.
 
diff --git a/configure.in b/configure.in
index 9d4b220..c4c5ec3 100644
--- a/configure.in
+++ b/configure.in
@@ -1,7 +1,7 @@
 AC_PREREQ(2.50)
 AC_INIT()
 
-AM_INIT_AUTOMAKE(bluez-libs, 3.30)
+AM_INIT_AUTOMAKE(bluez-libs, 3.31)
 AM_CONFIG_HEADER(config.h)
 
 AM_MAINTAINER_MODE