diff --git a/inventory/host_vars/buildvm-s390x-01.stg.s390.fedoraproject.org b/inventory/host_vars/buildvm-s390x-01.stg.s390.fedoraproject.org
index b813d8162b..693f3cc033 100644
--- a/inventory/host_vars/buildvm-s390x-01.stg.s390.fedoraproject.org
+++ b/inventory/host_vars/buildvm-s390x-01.stg.s390.fedoraproject.org
@@ -8,7 +8,7 @@ eth0_ipv4_ip: 10.1.102.50
 has_ipv4: yes
 lvm_size: 102400
 main_bridge: br0
-mem_size: 8192
+mem_size: 12288
 num_cpus: 2
 varnish_group: s390kojipkgs
 virt_install_command: "{{ virt_install_command_s390x_one_nic }}"