diff --git a/.gitignore b/.gitignore
index 0efa8775..1fb470b5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -70,3 +70,4 @@ gnome_calendar.anjuta
 /missing
 /mkinstalldirs
 Debug*
+.gdb_history
diff --git a/configure.ac b/configure.ac
index 875b2532..f449b7b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl -*- mode: m4 -*-
-AC_PREREQ([2.69])
+AC_PREREQ([2.68])
 AC_INIT([gnome-calendar],[0.0.2],[],[gnome-calendar])
 
 AC_CONFIG_HEADERS([config/config.h])