diff --git a/osm_lcm/ns.py b/osm_lcm/ns.py
index 83869bc..dcb044c 100644
--- a/osm_lcm/ns.py
+++ b/osm_lcm/ns.py
@@ -2428,6 +2428,7 @@
                         for vdur in monitored_vdurs:
                             vdu_id = vdur["vdu-id-ref"]
                             metric_name = vnf_monitoring_param.get("performance-metric")
+                            metric_name = f"osm_{metric_name}"
                             vnf_member_index = vnfr["member-vnf-index-ref"]
                             scalein_threshold = scaling_criteria.get(
                                 "scale-in-threshold"