diff --git a/artiq/language/types.py b/artiq/language/types.py
index d146f929a..c767dd663 100644
--- a/artiq/language/types.py
+++ b/artiq/language/types.py
@@ -5,8 +5,11 @@ annotations.
 
 from artiq.compiler import types, builtins
 
-__all__ = ["TNone", "TBool", "TInt32", "TInt64", "TFloat",
-           "TStr", "TTuple", "TList", "TRange32", "TRange64", "TVar"]
+__all__ = ["TNone", "TTuple",
+           "TBool", "TInt32", "TInt64", "TFloat",
+           "TStr", "TBytes", "TByteArray",
+           "TList", "TRange32", "TRange64",
+           "TVar"]
 
 TNone      = builtins.TNone()
 TBool      = builtins.TBool()
@@ -14,6 +17,8 @@ TInt32     = builtins.TInt(types.TValue(32))
 TInt64     = builtins.TInt(types.TValue(64))
 TFloat     = builtins.TFloat()
 TStr       = builtins.TStr()
+TBytes     = builtins.TBytes()
+TByteArray = builtins.TByteArray()
 TTuple     = types.TTuple
 TList      = builtins.TList
 TRange32   = builtins.TRange(builtins.TInt(types.TValue(32)))