diff --git a/inventory/group_vars/resultsdb-stg b/inventory/group_vars/resultsdb-stg
index 039b8246cb..c092a7879a 100644
--- a/inventory/group_vars/resultsdb-stg
+++ b/inventory/group_vars/resultsdb-stg
@@ -6,7 +6,7 @@ num_cpus: 4
 # for systems that do not match the above - specify the same parameter in
 # the host_vars/$hostname file
 
-tcp_ports: [ 80, 443, {{ resultsdb_db_port }} ]
+tcp_ports: [ 80, 443, "{{ resultsdb_db_port }}" ]
 fas_client_groups: sysadmin-qa
 nrpe_procs_warn: 250
 nrpe_procs_crit: 300