diff --git a/templates/mysql-clients.cnf.epp b/templates/mysql-clients.cnf.epp
index 15038e4bf66ce3e18644e3c707071b84a2d3b77a..4044b451f273ac8365de28bc853992c252242c1c 100644
--- a/templates/mysql-clients.cnf.epp
+++ b/templates/mysql-clients.cnf.epp
@@ -6,7 +6,7 @@
 prompt = "\u@\h [DB: \d]> "
 <% if $galera_proxysql::galera::files::custom_client_cnf_parameters =~ Hash { -%>
 <% keys($galera_proxysql::galera::files::custom_client_cnf_parameters).each | $item_key | { -%>
-<%= $item_key %> = <%= $galera_proxysql::galera::files::custom_client_cnf_parameters[$item_key] %>
+<%= $item_key %> = "<%= $galera_proxysql::galera::files::custom_client_cnf_parameters[$item_key] %>"
 <% } -%>
 <% } else { -%>
 <%= $galera_proxysql::galera::files::custom_client_cnf_parameters %>
diff --git a/templates/server.cnf.epp b/templates/server.cnf.epp
index 86b437bea4952da762adda3091261a2aac1754a1..78c9be2fd3e834357a266a1560f26212e3982b29 100644
--- a/templates/server.cnf.epp
+++ b/templates/server.cnf.epp
@@ -53,7 +53,7 @@ lower-case-table-names          = 0
 explicit_defaults_for_timestamp = ON
 <% if $galera_proxysql::galera::files::custom_server_cnf_parameters =~ Hash { -%>
 <% keys($galera_proxysql::galera::files::custom_server_cnf_parameters).each | $item_key | { -%>
-<%= $item_key %> = <%= $galera_proxysql::galera::files::custom_server_cnf_parameters[$item_key] %>
+<%= $item_key %> = "<%= $galera_proxysql::galera::files::custom_server_cnf_parameters[$item_key] %>"
 <% } -%>
 <% } else { -%>
 <%= $galera_proxysql::galera::files::custom_server_cnf_parameters %>