diff --git a/print-gre.c b/print-gre.c
index 505752a..0c13d2a 100644
--- a/print-gre.c
+++ b/print-gre.c
@@ -226,7 +226,7 @@
 		atalk_print(ndo, bp, len);
 		break;
 	case ETHERTYPE_GRE_ISO:
-		isoclns_print(ndo, bp, len, ndo->ndo_snapend - bp);
+		isoclns_print(ndo, bp, len);
 		break;
 	case ETHERTYPE_TEB:
 		ether_print(ndo, bp, len, ndo->ndo_snapend - bp, NULL, NULL);