diff --git a/mozilla/directory/c-sdk/ldap/libraries/libldap/open.c b/mozilla/directory/c-sdk/ldap/libraries/libldap/open.c
index 6608b238225..bd68f0a357b 100644
--- a/mozilla/directory/c-sdk/ldap/libraries/libldap/open.c
+++ b/mozilla/directory/c-sdk/ldap/libraries/libldap/open.c
@@ -56,10 +56,6 @@ static char copyright[] = "@(#) Copyright (c) 1995 Regents of the University of
 #define INADDR_LOOPBACK	((unsigned long) 0x7f000001)
 #endif
 
-#ifndef MAXHOSTNAMELEN
-#define MAXHOSTNAMELEN  64
-#endif
-
 #ifdef LDAP_DEBUG
 int	ldap_debug = 0;
 #endif