diff -ur tcptraceroute-1.4.orig/tcptraceroute.c tcptraceroute-1.4/tcptraceroute.c
--- tcptraceroute-1.4.orig/tcptraceroute.c      Wed Jul 31 07:51:27 2002
+++ tcptraceroute-1.4/tcptraceroute.c   Wed Aug 14 15:26:56 2002
@@ -256,6 +256,9 @@
 #ifdef DLT_PPP
        {       DLT_PPP,                        4,              "PPP"                   },
 #endif
+#ifdef DLT_PPP_ETHER
+       {       DLT_PPP_ETHER,          12,             "PPP_ETHER"             },
+#endif
 #ifdef DLT_LINUX_SLL
        {       DLT_LINUX_SLL,          16,             "PPP_HDLC"              },
 #endif