Bytes literal.
diff --git a/Lib/opcode.py b/Lib/opcode.py
index 1e15582..69982f2 100644
--- a/Lib/opcode.py
+++ b/Lib/opcode.py
@@ -111,6 +111,7 @@
 def_op('LOAD_LOCALS', 82)
 def_op('RETURN_VALUE', 83)
 def_op('IMPORT_STAR', 84)
+def_op('MAKE_BYTES', 85)
 def_op('YIELD_VALUE', 86)
 def_op('POP_BLOCK', 87)
 def_op('END_FINALLY', 88)