diff --git a/app/services/qualys_service.py b/app/services/qualys_service.py
index 03eecd6..872b5a6 100644
--- a/app/services/qualys_service.py
+++ b/app/services/qualys_service.py
@@ -670,6 +670,14 @@ def _refresh_all_agents_impl(db):
                     srv = db.execute(text("SELECT id FROM servers WHERE LOWER(hostname)=LOWER(:h)"),
                                      {"h": hostname}).fetchone()
                     server_id = srv.id if srv else None
+                    # Fallback : matching par IP si hostname ne match pas
+                    if not server_id and address:
+                        ip_match = db.execute(text(
+                            "SELECT s.id FROM servers s JOIN server_ips si ON si.server_id=s.id "
+                            "WHERE si.ip_address = CAST(:ip AS inet) LIMIT 1"
+                        ), {"ip": address}).fetchone()
+                        if ip_match:
+                            server_id = ip_match.id
                     if server_id and fqdn:
                         db.execute(text("UPDATE servers SET fqdn=:fqdn WHERE id=:sid AND (fqdn IS NULL OR fqdn='')"),
                                    {"fqdn": fqdn, "sid": server_id})