diff --git a/lib/libthr/arch/mips/include/pthread_md.h b/lib/libthr/arch/mips/include/pthread_md.h
index 2fc39aff7e7b..a25d1b011de8 100644
--- a/lib/libthr/arch/mips/include/pthread_md.h
+++ b/lib/libthr/arch/mips/include/pthread_md.h
@@ -1,51 +1,54 @@
 /*-
  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
  *
  * Copyright (c) 2005 David Xu <davidxu@freebsd.org>.
  * All rights reserved.
  *
  * 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 ``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 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.
  *
  * from: src/lib/libthr/arch/arm/include/pthread_md.h,v 1.3 2005/10/29 13:40:31 davidxu
  * $FreeBSD$
  */
 
 /*
  * Machine-dependent thread prototypes/definitions.
  */
 #ifndef _PTHREAD_MD_H_
 #define	_PTHREAD_MD_H_
 
 #include <sys/types.h>
 #include <machine/tls.h>
 
 #define	CPU_SPINWAIT
 
+/* For use in _Static_assert to check structs will fit in a page */
+#define	THR_PAGE_SIZE_MIN	PAGE_SIZE
+
 static __inline struct pthread *
 _get_curthread(void)
 {
 	if (_thr_initial)
 		return (_tcb_get()->tcb_thread);
 	return (NULL);
 }
 
 #endif /* _PTHREAD_MD_H_ */