diff --git a/PDP11/pdp11_ch.c b/PDP11/pdp11_ch.c
index 03a88e6f..770524c4 100644
--- a/PDP11/pdp11_ch.c
+++ b/PDP11/pdp11_ch.c
@@ -411,7 +411,7 @@ t_stat ch_svc(UNIT *uptr)
 
 t_stat ch_attach (UNIT *uptr, CONST char *cptr)
 {
-  char linkinfo[256];
+  char *linkinfo;
   t_stat r;
 
   if (address == -1)
@@ -419,13 +419,16 @@ t_stat ch_attach (UNIT *uptr, CONST char *cptr)
   if (peer[0] == '\0')
     return sim_messagef (SCPE_2FARG, "Must set Chaosnet PEER \"SET CH PEER=host:port\"\n");
 
-  linkinfo[sizeof (linkinfo) - 1] = '\0';
-  snprintf (linkinfo, sizeof (linkinfo) - 1, "Buffer=%d,Line=%d,UDP,%s,PACKET,Connect=%s",
+  linkinfo = (char *)calloc (100 + strlen (cptr) + strlen (peer), sizeof (*linkinfo));
+  if (linkinfo == NULL)
+      return SCPE_MEM;
+  sprintf (linkinfo, "Buffer=%d,Line=%d,UDP,%s,PACKET,Connect=%s",
            (int)sizeof (tx_buffer), 0, cptr, peer);
   r = tmxr_attach (&ch_tmxr, uptr, linkinfo);
+  free (linkinfo);
   if (r != SCPE_OK) {
     sim_debug (DBG_ERR, &ch_dev, "TMXR error opening master\n");
-    return sim_messagef (r, "Error Opening: %s\n", peer);
+    return sim_messagef (r, "Error Opening connection to: %s, using: %s\n", peer, cptr);
   }
 
   sim_clock_coschedule (uptr, 1000);        /* make sure polling starts */