1 files changed, 4 insertions, 1 deletions
diff --git a/lib/avp.c b/lib/avp.c
index 6f30d4c..bdc6216 100644
--- a/lib/avp.c
+++ b/lib/avp.c
@@ -106,7 +106,10 @@ rs_avp_dup (rs_const_avp *vp)
 {
   rs_avp *vp2;
 
-  vp2 = nr_vp_alloc (vp->da);
+  if (vp->da->flags.unknown)
+    vp2 = nr_vp_alloc_raw (vp->da->attr, vp->da->vendor);
+  else
+    vp2 = nr_vp_alloc (vp->da);
   if (vp2 == NULL)
     return NULL;