diff --git a/epan/dissectors/packet-gsm_abis_om2000.c b/epan/dissectors/packet-gsm_abis_om2000.c
index 7d2241f16e..457977568e 100644
--- a/epan/dissectors/packet-gsm_abis_om2000.c
+++ b/epan/dissectors/packet-gsm_abis_om2000.c
@@ -1057,11 +1057,9 @@ dissect_om2k_attrs(tvbuff_t *tvb, gint offset, proto_tree *tree)
 			offset += 2;
 			break;
 		case 0x90: /* Negotiation Record I */
-			len = tvb_get_guint8(tvb, offset++);
 			offset += dissect_om2k_negotiation_record1(tvb, offset, tree);
 			break;
 		case 0x91: /* Negotiation Record II */
-			len = tvb_get_guint8(tvb, offset++);
 			offset += dissect_om2k_negotiation_record2(tvb, offset, tree);
 			break;
 		case 0x92: /* Encryption Algorithm */