diff --git a/deploy-cluster-aws/example_deploy_conf.py b/deploy-cluster-aws/example_deploy_conf.py
index f1da94e9..ed755a0d 100644
--- a/deploy-cluster-aws/example_deploy_conf.py
+++ b/deploy-cluster-aws/example_deploy_conf.py
@@ -27,6 +27,11 @@ BRANCH="master"
 # What do you want to deploy?
 WHAT_TO_DEPLOY="servers"
 
+# SSH_KEY_NAME is the name of the SSH private key file
+# in $HOME/.ssh/
+# It is used for SSH communications with AWS instances.
+SSH_KEY_NAME="not-set-yet"
+
 # USE_KEYPAIRS_FILE is either True or False
 # Should node keypairs be read from keypairs.py?
 # (If False, then the keypairs will be whatever is in the the