diff --git a/telnet/telnet.c b/telnet/telnet.c
index c5b18c14..0f817bc8 100644
--- a/telnet/telnet.c
+++ b/telnet/telnet.c
@@ -860,7 +860,7 @@ suboption (void)
 	  name = gettermname ();
 	  len = strlen (name) + 4 + 2;
 
-	  if ((len < NETROOM ()) && (len <= (int) sizeof (temp)))
+	  if ((len < NETROOM ()) && (len < (int) sizeof (temp)))
 	    {
 	      snprintf ((char *) temp, sizeof (temp), "%c%c%c%c%s%c%c",
 			IAC, SB, TELOPT_TTYPE, TELQUAL_IS,