diff --git a/inventory/group_vars/releng-secondary b/inventory/group_vars/releng-secondary
index ec8654e51d..1ab23edd70 100644
--- a/inventory/group_vars/releng-secondary
+++ b/inventory/group_vars/releng-secondary
@@ -2,6 +2,7 @@
 # common items for the releng-* boxes
 lvm_size: 100000
 mem_size: 8196
+max_mem_size: "{{ mem_size }}"
 num_cpus: 16
 nm: 255.255.255.0
 dns: 10.5.126.21