diff --git a/magnum/drivers/k8s_coreos_v1/templates/fragments/add-proxy.yaml b/magnum/drivers/k8s_coreos_v1/templates/fragments/add-proxy.yaml
index 7c9eba1df8..ac5ff941f5 100644
--- a/magnum/drivers/k8s_coreos_v1/templates/fragments/add-proxy.yaml
+++ b/magnum/drivers/k8s_coreos_v1/templates/fragments/add-proxy.yaml
@@ -64,7 +64,7 @@ write_files:
 
         DOCKER_RESTART=1
 
-        echo "no_proxy=$NO_PROXY" >> ENVIRONMENT
+        echo "no_proxy=$NO_PROXY" >> $ENVIRONMENT
       fi
 
       if [ "$DOCKER_RESTART" -eq 1 ]; then