diff --git a/configure.ac b/configure.ac
index 0ddf0ad..bbf5c4f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -81,6 +81,10 @@
 AS_IF([test "x$NETWORK_CONF_DIR" == "x"], [NETWORK_CONF_DIR="/etc/systemd/network"])
 AC_DEFINE_UNQUOTED([NETWORK_CONF_DIR], ["$NETWORK_CONF_DIR"], [Network configuration directory])
 
+AC_DEFINE(SYSTEMD_BUSNAME, "org.freedesktop.systemd1", [systemd busname.])
+AC_DEFINE(SYSTEMD_PATH, "/org/freedesktop/systemd1", [systemd path.])
+AC_DEFINE(SYSTEMD_INTERFACE, "org.freedesktop.systemd1.Manager", [systemd interface.])
+
 # Create configured output.
 AC_CONFIG_FILES([Makefile test/Makefile])
 AC_OUTPUT