diff --git a/misp_modules/modules/expansion/onyphe.py b/misp_modules/modules/expansion/onyphe.py
index eba3564..c777707 100644
--- a/misp_modules/modules/expansion/onyphe.py
+++ b/misp_modules/modules/expansion/onyphe.py
@@ -106,7 +106,7 @@ class OnypheClient:
                     if type(r['hostname']) is list:
                         for hostname in r['hostname']:
                             self.misp_event.add_attribute(
-                                'hostname', r['hostname'])
+                                'hostname', hostname)
 
                 if 'ip' in r:
                     if type(r['ip']) is str: