diff --git a/mibuild/crg.py b/mibuild/crg.py
index 0d4dcfbb5..6448ec49c 100644
--- a/mibuild/crg.py
+++ b/mibuild/crg.py
@@ -1,6 +1,7 @@
 from migen.fhdl.structure import *
+from migen.fhdl.module import Module
 
-class CRG:
+class CRG(Module):
 	def get_clock_domains(self):
 		r = dict()
 		for k, v in self.__dict__.items():
@@ -8,9 +9,6 @@ class CRG:
 				r[v.name] = v
 		return r
 
-	def get_fragment(self):
-		return Fragment()
-
 class SimpleCRG(CRG):
 	def __init__(self, platform, clk_name, rst_name):
 			self.cd = ClockDomain("sys")