diff --git a/appl/telnet/libtelnet/auth.c b/appl/telnet/libtelnet/auth.c
index a1e9e2158..36f73d450 100644
--- a/appl/telnet/libtelnet/auth.c
+++ b/appl/telnet/libtelnet/auth.c
@@ -646,7 +646,7 @@ auth_gen_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen)
     buf[buflen-2] = '*';
     buflen -= 2;
     for (; cnt > 0; cnt--, data++) {
-	snprintf(tbuf, sizeof(tbuf), " %d", *data);
+	snprintf((char*)tbuf, sizeof(tbuf), " %d", *data);
 	for (cp = tbuf; *cp && buflen > 0; --buflen)
 	    *buf++ = *cp++;
 	if (buflen <= 0)
diff --git a/appl/telnet/libtelnet/kerberos.c b/appl/telnet/libtelnet/kerberos.c
index 413ed0023..07cd3e197 100644
--- a/appl/telnet/libtelnet/kerberos.c
+++ b/appl/telnet/libtelnet/kerberos.c
@@ -200,7 +200,8 @@ kerberos4_send(char *name, Authenticator *ap)
 	printf("get_cred failed: %s\r\n", krb_get_err_text(r));
 	return(0);
     }
-    if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) {
+    if (!auth_sendname((unsigned char*)UserNameRequested, 
+		       strlen(UserNameRequested))) {
 	if (auth_debug_mode)
 	    printf("Not enough room for user name\r\n");
 	return(0);
@@ -571,11 +572,11 @@ kerberos4_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen)
 	goto common2;
 
     default:
-	snprintf(buf, buflen, " %d (unknown)", data[3]);
+	snprintf((char*)buf, buflen, " %d (unknown)", data[3]);
     common2:
 	BUMP(buf, buflen);
 	for (i = 4; i < cnt; i++) {
-	    snprintf(buf, buflen, " %d", data[i]);
+	    snprintf((char*)buf, buflen, " %d", data[i]);
 	    BUMP(buf, buflen);
 	}
 	break;
@@ -647,7 +648,7 @@ pack_cred(CREDENTIALS *cred, unsigned char *buf)
 static int
 unpack_cred(unsigned char *buf, int len, CREDENTIALS *cred)
 {
-    unsigned char *p = buf;
+    char *p = (char*)buf;
     u_int32_t tmp;
 
     strncpy (cred->service, p, ANAME_SZ);
diff --git a/appl/telnet/libtelnet/kerberos5.c b/appl/telnet/libtelnet/kerberos5.c
index b8a3b2843..4c9c1f661 100644
--- a/appl/telnet/libtelnet/kerberos5.c
+++ b/appl/telnet/libtelnet/kerberos5.c
@@ -118,7 +118,7 @@ Data(Authenticator *ap, int type, void *d, int c)
     unsigned char *cd = (unsigned char *)d;
 
     if (c == -1)
-	c = strlen(cd);
+	c = strlen((char*)cd);
 
     if (auth_debug_mode) {
 	printf("%s:%d: [%d] (%d)",
@@ -713,11 +713,11 @@ kerberos5_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen)
 	goto common2;
 
     default:
-	snprintf(buf, buflen, " %d (unknown)", data[3]);
+	snprintf((char*)buf, buflen, " %d (unknown)", data[3]);
     common2:
 	BUMP(buf, buflen);
 	for (i = 4; i < cnt; i++) {
-	    snprintf(buf, buflen, " %d", data[i]);
+	    snprintf((char*)buf, buflen, " %d", data[i]);
 	    BUMP(buf, buflen);
 	}
 	break;
diff --git a/appl/telnet/telnet/commands.c b/appl/telnet/telnet/commands.c
index b725be056..8583819a7 100644
--- a/appl/telnet/telnet/commands.c
+++ b/appl/telnet/telnet/commands.c
@@ -1564,7 +1564,7 @@ env_init(void)
 	 * "unix:0.0", we have to get rid of "unix" and insert our
 	 * hostname.
 	 */
-	if ((ep = env_find("DISPLAY"))
+	if ((ep = env_find((unsigned char*)"DISPLAY"))
 	    && (*ep->value == ':'
 	    || strncmp((char *)ep->value, "unix:", 5) == 0)) {
 		char hbuf[256+1];
@@ -1604,7 +1604,8 @@ env_init(void)
 	 * USER with the value from LOGNAME.  By default, we
 	 * don't export the USER variable.
 	 */
-	if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
+	if ((env_find((unsigned char*)"USER") == NULL) && 
+	    (ep = env_find((unsigned char*)"LOGNAME"))) {
 		env_define((unsigned char *)"USER", ep->value);
 		env_unexport((unsigned char *)"USER");
 	}
diff --git a/appl/telnet/telnet/main.c b/appl/telnet/telnet/main.c
index eaa33201d..8b318e13b 100644
--- a/appl/telnet/telnet/main.c
+++ b/appl/telnet/telnet/main.c
@@ -180,7 +180,7 @@ main(int argc, char **argv)
 		    /* sometimes we don't want a mangled display */
 		    char *p;
 		    if((p = getenv("DISPLAY")))
-			env_define("DISPLAY", (unsigned char*)p);
+			env_define((unsigned char*)"DISPLAY", (unsigned char*)p);
 		    break;
 		}
 		case 'E':