diff --git a/inventory/host_vars/download-ib01.fedoraproject.org b/inventory/host_vars/download-ib01.fedoraproject.org
index 3d44e9b3dd..7db851fa9c 100644
--- a/inventory/host_vars/download-ib01.fedoraproject.org
+++ b/inventory/host_vars/download-ib01.fedoraproject.org
@@ -6,7 +6,7 @@ vmhost: ibiblio01.fedoraproject.org
 volgroup: /dev/vg_guests
 
 eth0_ipv4: 152.19.134.145
-eth0_ipv4_nm: 255.255.255.128
+eth0_ipv4_nm: 25
 eth0_ipv4_gw: 152.19.134.129
 has_ipv6: yes
 eth0_ipv6: "2600:2701:4000:5211:dead:beef:00fe:fed6"