diff --git a/migen/genlib/misc.py b/migen/genlib/misc.py
index 1130829ce..97d0be0e0 100644
--- a/migen/genlib/misc.py
+++ b/migen/genlib/misc.py
@@ -1,12 +1,6 @@
 from migen.fhdl.std import *
-from migen.fhdl.tools import value_bits_sign
 from migen.fhdl.structure import _Operator
 
-def bitreverse(s):
-	length, signed = value_bits_sign(s)
-	l = [s[i] for i in reversed(range(length))]
-	return Cat(*l)
-
 def optree(op, operands, lb=None, ub=None, default=None):
 	if lb is None:
 		lb = 0