diff --git a/litex/gen/genlib/cdc.py b/litex/gen/genlib/cdc.py
index b77356be8..130869f83 100644
--- a/litex/gen/genlib/cdc.py
+++ b/litex/gen/genlib/cdc.py
@@ -5,6 +5,7 @@ from math import gcd
 
 from migen import *
 
+from migen.genlib.cdc import MultiReg, PulseSynchronizer
 from migen.genlib.resetsync import AsyncResetSynchronizer
 
 from litex.gen.genlib.misc import WaitTimer