diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
index 3873a51f7359..97432b535288 100644
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -38,6 +38,8 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20180610: Remove sys/capability.h
+OLD_FILES+=usr/include/sys/capability.h
 # 20180609: obsolete libc++ files missed from the 5.0.0 import
 OLD_FILES+=usr/include/c++/v1/__refstring
 OLD_FILES+=usr/include/c++/v1/__undef_min_max
diff --git a/sys/sys/capability.h b/sys/sys/capability.h
deleted file mode 100644
index 4b07c090e405..000000000000
--- a/sys/sys/capability.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 2014 Robert N. M. Watson
- * All rights reserved.
- *
- * This software was developed at the University of Cambridge Computer
- * Laboratory with support from a grant from Google, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD$
- */
-
-/*
- * Historically, the key userspace and kernel Capsicum definitions were found
- * in this file.  However, it conflicted with POSIX.1e's capability.h, so has
- * been renamed capsicum.h.  The file remains for backwards compatibility
- * reasons as a nested include.
- */
-#ifndef _SYS_CAPABILITY_H_
-#define	_SYS_CAPABILITY_H_
-
-#warning this file includes <sys/capability.h> which is deprecated
-#include <sys/capsicum.h>
-
-#endif /* !_SYS_CAPABILITY_H_ */