diff --git a/data/grid5000/sites/nancy/clusters/graphene/nodes/graphene-40.json b/data/grid5000/sites/nancy/clusters/graphene/nodes/graphene-40.json
index 5dccea1fc0f6e33bf7fb4c7b8549e463b540aa99..7850dffc8eb8b82da72305a9385480e9dbf306d8 100644
--- a/data/grid5000/sites/nancy/clusters/graphene/nodes/graphene-40.json
+++ b/data/grid5000/sites/nancy/clusters/graphene/nodes/graphene-40.json
@@ -76,7 +76,7 @@
       "enabled": true,
       "interface": "Ethernet",
       "ip": "172.17.64.40",
-      "mac": "00:e0:81:d5:06:f7",
+      "mac": "00:10:20:3d:40:5f",
       "management": true,
       "mountable": false,
       "mounted": false,
diff --git a/generators/input/nancy.yaml b/generators/input/nancy.yaml
index 840b597c92348045f2e1787b678bc454bc6c945a..4f1edc7e70a28707b19decf58ccf8def7b2669d5 100644
--- a/generators/input/nancy.yaml
+++ b/generators/input/nancy.yaml
@@ -3484,7 +3484,7 @@ graphene-40:
   switch_ipmi_pos: 1/0/25
   bios_ver: 7.02
   bios_release: 06/01/2011
-  mac_mgt: 00:e0:81:d5:06:f7
+  mac_mgt: 00:10:20:3d:40:5f
   ip_mgt: 172.17.64.40
   ip_ib: 172.16.66.40
   ip_eth0: 172.16.64.40