diff --git a/nodemecu.conf.sample b/nodemecu.conf.sample
index bfb5883..84b73a1 100644
--- a/nodemecu.conf.sample
+++ b/nodemecu.conf.sample
@@ -14,3 +14,4 @@ stack=$install_dir/stack
 historical=$install_dir/historical
 log=$install_dir/errors.log
 corrupt=$install_dir/corrupt
+private_key=$install_dir/key