diff --git a/bedstead.c b/bedstead.c
index f6e134e..f535969 100644
--- a/bedstead.c
+++ b/bedstead.c
@@ -2118,6 +2118,9 @@ static struct glyph {
  {"\30\04\04\04\04\04\04\04\03", U(23B1) }, /* two-level brace \ */
  {"\37\20\10\10\04\04\02\02\01", U(23B2), JOIN_D }, /* summation top */
  {"\01\02\02\04\04\10\10\20\37", U(23B3), JOIN_U }, /* summation bottom */
+ {"\37\21\21\00\00\00\00\00\00", U(23B4) }, /* brackettop */
+ {"\00\00\00\00\21\21\37\00\00", U(23B5) }, /* bracketbottom */
+ {"\21\21\37\00\37\21\21\00\00", U(23B6) }, /* bracketbottom + brackettop */
  {"\37\00\00\00\00\00\00\00\00", U(23BA), JOIN_H }, /* horizontal scan 1 */
  {"\00\00\37\00\00\00\00\00\00", U(23BB), JOIN_H }, /* horizontal scan 3 */
  {"\00\00\00\00\00\00\37\00\00", U(23BC), JOIN_H }, /* horizontal scan 7 */