diff --git a/openair-cn/GTPV1-U/GTPUAH/xt_GTPUAH.c b/openair-cn/GTPV1-U/GTPUAH/xt_GTPUAH.c
index 471860c2641b1d05ebc7cf5a0eea529a4cacb18f..6e6d0df30ac906a172b025fbc47540f0d85cef49 100755
--- a/openair-cn/GTPV1-U/GTPUAH/xt_GTPUAH.c
+++ b/openair-cn/GTPV1-U/GTPUAH/xt_GTPUAH.c
@@ -365,6 +365,9 @@ _gtpuah_tg4_add(struct sk_buff *old_skb_pP, const struct xt_action_param *par_pP
                 goto free_new_skb;
         }
         return;
+    } else {
+        pr_info("GTPUAH: PACKET DROPPED because of mtu %u < (%u + %u)\n",
+                mtu, orig_iplen, headroom_reqd);
     }
 free_new_skb:
     pr_info("GTPUAH: PACKET DROPPED\n");