diff --git a/inventory/group_vars/mm-frontend b/inventory/group_vars/mm-frontend
index e6acaea883..92bfbc2d24 100644
--- a/inventory/group_vars/mm-frontend
+++ b/inventory/group_vars/mm-frontend
@@ -1,4 +1,5 @@
 ---
+mem_size: 4096
 
 tcp_ports: [ 80,
     # These 2 ports are used by fedmsg.