diff --git a/src/net/reply.c b/src/net/reply.c
index 8c42833b9..9dfc5c4fb 100644
--- a/src/net/reply.c
+++ b/src/net/reply.c
@@ -98,7 +98,7 @@ _z_reply_t _z_reply_create(_z_keyexpr_t keyexpr, z_reply_tag_t tag, _z_id_t id,
         _z_slice_copy(&sample.payload._slice, payload);
         sample.kind = kind;
         sample.timestamp = _z_timestamp_duplicate(timestamp);
-        sample.attachment = att;  // FIXME: call z_attachment_move or copy
+        sample.attachment = _z_bytes_duplicate(&att);
 
         // Create sample rc from value
         reply.data.sample = _z_sample_rc_new_from_val(sample);
diff --git a/src/net/sample.c b/src/net/sample.c
index f71744358..7ceca0f2f 100644
--- a/src/net/sample.c
+++ b/src/net/sample.c
@@ -88,7 +88,7 @@ _z_sample_t _z_sample_create(const _z_keyexpr_t *key, const _z_slice_t *payload,
     s.kind = kind;
     s.timestamp = timestamp;
     s.qos = qos;
-    s.attachment = att;  // FIXME: call z_attachment_move or copy
+    s.attachment = _z_bytes_duplicate(&att);
     return s;
 }
 #else