diff --git a/migen/fhdl/decorators.py b/migen/fhdl/decorators.py
index 62cda094e..ddd1a9655 100644
--- a/migen/fhdl/decorators.py
+++ b/migen/fhdl/decorators.py
@@ -48,11 +48,11 @@ class ModuleTransformer:
 
 	@classmethod
 	def adhoc(cls, i, *args, **kwargs):
-		warnings.warn("deprecated, use the plain transformer", DeprecationWarning)
+		warnings.warn("deprecated, use the plain transformer", DeprecationWarning, 2)
 		return cls(*args, **kwargs)(i)
 
 def DecorateModule(transformer, *args, **kwargs):
-	warnings.warn("deprecated, use the plain transformer", DeprecationWarning)
+	warnings.warn("deprecated, use the plain transformer", DeprecationWarning, 2)
 	return transformer.__self__(*args, **kwargs)
 
 class ControlInserter(ModuleTransformer):
diff --git a/migen/fhdl/std.py b/migen/fhdl/std.py
index 56bd97bcd..a9ac658dd 100644
--- a/migen/fhdl/std.py
+++ b/migen/fhdl/std.py
@@ -3,3 +3,5 @@ from migen.fhdl.module import Module, FinalizeError
 from migen.fhdl.specials import TSTriple, Instance, Memory
 from migen.fhdl.bitcontainer import log2_int, bits_for, flen, fiter, fslice, freversed
 from migen.fhdl.decorators import DecorateModule, InsertCE, InsertReset, RenameClockDomains
+from migen.fhdl.decorators import (CEInserter, ResetInserter,
+	ClockDomainsRenamer, ModuleTransformer)