diff --git a/inc/lektor/config.def b/inc/lektor/config.def
index 8c63644b9417df9583ab849a505b75ec96fadcda..5f1f447301ca10f030c582ec7d926b9b6a8d2f70 100644
--- a/inc/lektor/config.def
+++ b/inc/lektor/config.def
@@ -1,3 +1,5 @@
+value_opt("log", "WARN") /* Can be DEBUG, INFO, WARN, ERROR */
+
 section("externals")
 value("mkvpropedit",    "/usr/bin/mkvpropedit")