diff --git a/src/fd.c b/src/fd.c
index 6c53a3b..2621278 100644
--- a/src/fd.c
+++ b/src/fd.c
@@ -202,6 +202,7 @@
 	fdtab[fd].owner = NULL;
 	fdtab[fd].updated = 0;
 	fdtab[fd].new = 0;
+	fdtab[fd].process_mask = 0;
 	if (do_close)
 		close(fd);
 	SPIN_UNLOCK(FD_LOCK, &fdtab[fd].lock);