diff --git a/roles/manage/templates/metadata_configuration/sram.schema.json.j2 b/roles/manage/templates/metadata_configuration/sram.schema.json.j2
index 8134d95f5..3d12b74aa 100644
--- a/roles/manage/templates/metadata_configuration/sram.schema.json.j2
+++ b/roles/manage/templates/metadata_configuration/sram.schema.json.j2
@@ -271,6 +271,11 @@
               "$ref": "#/definitions/ArpAttribute",
               "alias": "urn:oid:1.3.6.1.4.1.1076.20.40.20.10.3",
               "deprecated": true
+            },
+            "urn:mace:surf.nl:attribute-def:ssh-key": {
+              "$ref": "#/definitions/ArpAttribute",
+              "alias": "urn:oid:1.3.6.1.4.1.24552.500.1.1.1.13",
+              "multiplicity": true
             }
           }
         }