diff --git a/appl/ftp/ftpd/ftpd.c b/appl/ftp/ftpd/ftpd.c
index 50e0120b8..6f3426249 100644
--- a/appl/ftp/ftpd/ftpd.c
+++ b/appl/ftp/ftpd/ftpd.c
@@ -1757,7 +1757,7 @@ done:
 }
 
 void
-cwd(char *path)
+cwd(const char *path)
 {
 
 	if (chdir(path) < 0)