diff --git a/sys/kernel/descrip.c b/sys/kernel/descrip.c
index 54e93a6..5fdd69c 100644
--- a/sys/kernel/descrip.c
+++ b/sys/kernel/descrip.c
@@ -79,6 +79,7 @@
       }
       break;
     case 3:
+            if (uap->fd > 3)
             fp->f_flag = O_RDWR & O_ACCMODE;
       td->td_retval[0] = fp->f_flag;
       break;