diff --git a/appl/telnet/telnet/externs.h b/appl/telnet/telnet/externs.h
index ae5abcdd2..4937347ea 100644
--- a/appl/telnet/telnet/externs.h
+++ b/appl/telnet/telnet/externs.h
@@ -209,7 +209,6 @@ extern void
     TerminalRestoreState (void),
     TerminalSaveState (void),
     tninit (void),
-    upcase (char *),
     willoption (int),
     wontoption (int);