diff --git a/tools/kolla-ansible b/tools/kolla-ansible
index 5af0df5d2fdccf4708a7b1fb6053f399ee321e10..28194430d8cb64d91a74d3f7f500a76a8cce3eac 100755
--- a/tools/kolla-ansible
+++ b/tools/kolla-ansible
@@ -81,8 +81,8 @@ CONFIG_DIR="/etc/kolla"
 PASSWORDS_FILE="${CONFIG_DIR}/passwords.yml"
 DANGER_CONFIRM=
 INCLUDE_IMAGES=
-# Serial is not recommended and disable in default. User could enable it by
-# simple configure ANSIBLE_SERIAL variable
+# Serial is not recommended and disabled by default. User could enable it by
+# simply configuring ANSIBLE_SERIAL variable.
 ANSIBLE_SERIAL=${ANSIBLE_SERIAL:-0}
 
 while [ "$#" -gt 0 ]; do