diff --git a/cluster/ubuntu/config-default.sh b/cluster/ubuntu/config-default.sh
index e189d7afd06..240602f850a 100755
--- a/cluster/ubuntu/config-default.sh
+++ b/cluster/ubuntu/config-default.sh
@@ -107,7 +107,7 @@ ENABLE_CLUSTER_UI="${KUBE_ENABLE_CLUSTER_UI:-true}"
 #RUNTIME_CONFIG=""
 
 # Optional: Add http or https proxy when download easy-rsa.
-# Add envitonment variable separated with blank space like "http_proxy=http://10.x.x.x:8080 https_proxy=https://10.x.x.x:8443"
+# Add environment variable separated with blank space like "http_proxy=http://10.x.x.x:8080 https_proxy=https://10.x.x.x:8443"
 PROXY_SETTING=${PROXY_SETTING:-""}
 
 DEBUG=${DEBUG:-"false"}