diff --git a/generators/input-validators/schema-network_equipments.yaml b/generators/input-validators/schema-network_equipments.yaml
index 1a881744fba259c6f21c9df3c75f7d6f1c3b8356..72d0ceee7d02b3e1f25640d85b92ed0fa75fd665 100644
--- a/generators/input-validators/schema-network_equipments.yaml
+++ b/generators/input-validators/schema-network_equipments.yaml
@@ -1,6 +1,7 @@
 ---
 model: string
 kind: string
+serial: optional_string
 site: string
 alias : optional_array
 backplane_bps: optional_integer