diff --git a/templates/cassandra1.yaml.erb b/templates/cassandra1.yaml.erb
index 73a2699..2bcbf5c 100644
--- a/templates/cassandra1.yaml.erb
+++ b/templates/cassandra1.yaml.erb
@@ -227,7 +227,7 @@ seed_provider:
       parameters:
           # seeds is actually a comma-delimited list of addresses.
           # Ex: "<ip1>,<ip2>,<ip3>"
-          - seeds: <%= @seeds.join(',') %>
+          - seeds: "<%= @seeds.join(',') %>"
 
 # emergency pressure valve: each time heap usage after a full (CMS)
 # garbage collection is above this fraction of the max, Cassandra will