diff --git a/dev/puppet/kadeployg5k.rb b/dev/puppet/kadeployg5k.rb
index 41d9f6e97d1b2230e51c6cfb02331e789ad9e11c..0770c6baaa18dfcbd26b1dfd06b414189315146f 100644
--- a/dev/puppet/kadeployg5k.rb
+++ b/dev/puppet/kadeployg5k.rb
@@ -116,7 +116,7 @@ end
 
     output_file = Pathname("#{$output_dir}/modules/kadeployg5k/files/#{site_uid}/server_conf#{suffix.tr('-', '_')}/clusters.conf")
     output_file.dirname.mkpath()
-    File.write(output_file, clusters_conf.to_yaml)
+    write_yaml(output_file, clusters_conf)
     
     #
     # Generate <cluster_uid>-cluster.conf files