diff --git a/appl/ftp/ftpd/ftpd_locl.h b/appl/ftp/ftpd/ftpd_locl.h
index 3918f9b2f..3cd021b6d 100644
--- a/appl/ftp/ftpd/ftpd_locl.h
+++ b/appl/ftp/ftpd/ftpd_locl.h
@@ -166,7 +166,7 @@ extern int LIBPREFIX(fclose)      (FILE *);
 
 int fclose(FILE *stream);
 
-int yyparse();
+int yyparse(void);
 
 #ifndef LOG_FTP
 #define LOG_FTP LOG_DAEMON