diff --git a/ChangeLog b/ChangeLog
index 8ea94b6eb1..5f21fe463a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2019-05-23  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/unix/sysv/linux/bits/fcntl-linux.h [__USE_GNU]
+	(F_SEAL_FUTURE_WRITE): New macro.
+
 2019-05-23 Alexandra Hajkova  <ahajkova@redhat.com>
 
        * elf/Makefile (test-container): Add tst-ldconfig-bad-aux-cache.
diff --git a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
index 4b4d6f7ae5..3f32eb328b 100644
--- a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
+++ b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
@@ -284,6 +284,8 @@ struct f_owner_ex
 # define F_SEAL_SHRINK	0x0002	/* Prevent file from shrinking.  */
 # define F_SEAL_GROW	0x0004	/* Prevent file from growing.  */
 # define F_SEAL_WRITE	0x0008	/* Prevent writes.  */
+# define F_SEAL_FUTURE_WRITE	0x0010	/* Prevent future writes while
+					   mapped.  */
 #endif
 
 #ifdef __USE_GNU