diff --git a/man5/proc.5 b/man5/proc.5
index a28dbdcc7..888535449 100644
--- a/man5/proc.5
+++ b/man5/proc.5
@@ -5603,6 +5603,19 @@ user should run
 .BR sync (1)
 first.
 .TP
+.IR  /proc/sys/vm/sysctl_hugetlb_shm_group " (since Linux 2.6.7)"
+This writable file contains a group ID that is allowed
+to allocate memory using huge pages.
+If a process has a filesystem group ID or any supplememtary group ID that
+matches this group ID,
+then it can make huge-page allocations without holding the
+.BR CAP_IPC_LOCK
+capability; see
+.BR memfd_create (2),
+.BR mmap (2),
+and
+.BR shmget (2).
+.TP
 .IR /proc/sys/vm/legacy_va_layout " (since Linux 2.6.9)"
 .\" The following is from Documentation/filesystems/proc.txt
 If nonzero, this disables the new 32-bit memory-mapping layout;