diff --git a/appl/telnet/libtelnet/misc.h b/appl/telnet/libtelnet/misc.h
index 41ffa7f67..e31556530 100644
--- a/appl/telnet/libtelnet/misc.h
+++ b/appl/telnet/libtelnet/misc.h
@@ -34,8 +34,8 @@
  */
 
 extern char *UserNameRequested;
-extern char *LocalHostName;
-extern char *RemoteHostName;
+extern const char *LocalHostName;
+extern const char *RemoteHostName;
 extern int ConnectedCount;
 extern int ReservedPort;