diff --git a/x11/libxshmfence/files/patch-src__xshmfence_alloc.c b/x11/libxshmfence/files/patch-src__xshmfence_alloc.c
index b6e98334e981..eb60dfd000dc 100644
--- a/x11/libxshmfence/files/patch-src__xshmfence_alloc.c
+++ b/x11/libxshmfence/files/patch-src__xshmfence_alloc.c
@@ -1,24 +1,38 @@
---- src/xshmfence_alloc.c.orig	2015-03-04 15:28:23 UTC
+--- src/xshmfence_alloc.c.orig	2018-02-26 17:26:59 UTC
 +++ src/xshmfence_alloc.c
-@@ -73,13 +73,21 @@ xshmfence_alloc_shm(void)
+@@ -48,9 +48,13 @@ static int memfd_create(const char *name,
+ #include <sys/memfd.h>
+ #else
+ /* flags for memfd_create(2) (unsigned int) */
++#ifndef MFD_CLOEXEC
+ #define MFD_CLOEXEC		0x0001U
++#endif
++#ifndef MFD_ALLOW_SEALING
+ #define MFD_ALLOW_SEALING	0x0002U
+ #endif
++#endif
+ 
+ #endif
+ 
+@@ -73,13 +77,21 @@ xshmfence_alloc_shm(void)
  	fd = memfd_create("xshmfence", MFD_CLOEXEC|MFD_ALLOW_SEALING);
  	if (fd < 0)
  #endif
 +#ifdef SHM_ANON
 +	fd = shm_open(SHM_ANON, O_RDWR|O_CLOEXEC, 0600);
 +	if (fd < 0)
 +#endif
  	{
  #ifdef O_TMPFILE
  		fd = open(SHMDIR, O_TMPFILE|O_RDWR|O_CLOEXEC|O_EXCL, 0666);
  		if (fd < 0)
  #endif
  		{
 +#ifdef HAVE_MKOSTEMP
 +			fd = mkostemp(template, O_CLOEXEC);
 +#else
  			fd = mkstemp(template);
 +#endif
  			if (fd < 0)
  				return fd;
  			unlink(template);