diff --git a/winsup/cygwin/flock.cc b/winsup/cygwin/flock.cc
index 2332f54..ac3f772 100644
--- a/winsup/cygwin/flock.cc
+++ b/winsup/cygwin/flock.cc
@@ -638,13 +638,14 @@ inode_t::get_all_locks_list ()
 POBJECT_ATTRIBUTES
 lockf_t::create_lock_obj_attr (lockfattr_t *attr, ULONG flags)
 {
+  static char buf[SD_MIN_SIZE];
   __small_swprintf (attr->name, LOCK_OBJ_NAME_FMT,
 		    lf_flags & (F_POSIX | F_FLOCK), lf_type, lf_start, lf_end,
 		    lf_id, lf_wid, lf_ver);
   RtlInitCountedUnicodeString (&attr->uname, attr->name,
 			       LOCK_OBJ_NAME_LEN * sizeof (WCHAR));
   InitializeObjectAttributes (&attr->attr, &attr->uname, flags, lf_inode->i_dir,
-			      everyone_sd (FLOCK_EVENT_ACCESS));
+			      _everyone_sd (buf, FLOCK_EVENT_ACCESS));
   return &attr->attr;
 }