diff --git a/ChangeLog.new-variables b/ChangeLog.new-variables
new file mode 100644
index 0000000..3b94cc2
--- /dev/null
+++ b/ChangeLog.new-variables
@@ -0,0 +1,3 @@
+Define some useful variables
+
+	* configure.ac: Define some useful variables.
diff --git a/configure.ac b/configure.ac
index d362f68..49761af 100644
--- a/configure.ac
+++ b/configure.ac
@@ -176,6 +176,18 @@ AC_SUBST(host_kernel)
 AC_SUBST(target_cpu)
 AC_SUBST(platform)
 
+# Define default variables
+case "$host_os" in
+  netbsd* | openbsd*)
+        # Because /boot is used for the boot block in NetBSD and OpenBSD,
+        bootdirname=''      ;;
+  *)    bootdirname='boot'  ;;
+esac
+AC_SUBST(bootdirname)
+
+grubdirname="$PACKAGE"
+AC_SUBST(grubdirname)
+
 #
 # Checks for build programs.
 #