diff --git a/appl/ftp/ftp/ftp_locl.h b/appl/ftp/ftp/ftp_locl.h
index 0b87484d6..9788a1bd6 100644
--- a/appl/ftp/ftp/ftp_locl.h
+++ b/appl/ftp/ftp/ftp_locl.h
@@ -55,6 +55,18 @@
 
 #include "krb4.h"
 
+#include "roken.h"
+
+#ifdef NEED_OPTARG_DECLARATION
+extern char *optarg;
+#endif
+#ifdef NEED_OPTIND_DECLARATION
+extern int optarg;
+#endif
+#ifdef NEED_OPTERR_DECLARATION
+extern int opterr;
+#endif
+
 #if defined(__sun__) && !defined(__svr4)
 int fclose(FILE*);
 int pclose(FILE*);