diff --git a/usr.sbin/ppp/lcp.c b/usr.sbin/ppp/lcp.c
index 9591aef4a92..462b81fb851 100644
--- a/usr.sbin/ppp/lcp.c
+++ b/usr.sbin/ppp/lcp.c
@@ -17,7 +17,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: lcp.c,v 1.63 1998/09/04 18:25:59 brian Exp $
+ * $Id: lcp.c,v 1.64 1998/09/09 00:03:09 brian Exp $
  *
  * TODO:
  *	o Limit data field length by MRU
@@ -663,13 +663,24 @@ LcpDecodeConfig(struct fsm *fp, u_char *cp, int plen, int mode_type,
 #ifdef HAVE_DES
             link2physical(fp->link)->dl->chap.using_MSChap = cp[4] == 0x80;
 #endif
-	  } else if (IsAccepted(lcp->cfg.pap)) {
-	    *dec->nakend++ = *cp;
-	    *dec->nakend++ = 4;
-	    *dec->nakend++ = (unsigned char) (PROTO_PAP >> 8);
-	    *dec->nakend++ = (unsigned char) PROTO_PAP;
-	  } else
-	    goto reqreject;
+	  } else {
+            if (IsAccepted(lcp->cfg.chap)) {
+#ifndef HAVE_DES
+              if (cp[4] == 0x80)
+                log_Printf(LogWARN, "Chap 0x80 not available without DES\n");
+              else
+#endif
+                log_Printf(LogWARN, "Chap 0x%02x not supported\n",
+                           (unsigned)cp[4]);
+            }
+            if (IsAccepted(lcp->cfg.pap)) {
+	      *dec->nakend++ = *cp;
+	      *dec->nakend++ = 4;
+	      *dec->nakend++ = (unsigned char) (PROTO_PAP >> 8);
+	      *dec->nakend++ = (unsigned char) PROTO_PAP;
+	    } else
+	      goto reqreject;
+          }
 	  break;
 
 	default: