diff --git a/sys/kern/kern_descrip.c b/sys/kern/kern_descrip.c
--- a/sys/kern/kern_descrip.c
+++ b/sys/kern/kern_descrip.c
@@ -632,8 +632,8 @@
 			/*
 			 * UF_RESOLVE_BENEATH is sticky and cannot be cleared.
 			 */
-			fde->fde_flags = (fde->fde_flags & ~UF_EXCLOSE) |
-			    fd_to_fde_flags(arg);
+			fde->fde_flags = (fde->fde_flags &
+			    ~(UF_EXCLOSE | UF_FOCLOSE)) | fd_to_fde_flags(arg);
 			error = 0;
 		}
 		FILEDESC_XUNLOCK(fdp);