diff --git a/litex/boards/targets/kcu105.py b/litex/boards/targets/kcu105.py
index 88ef5b6b7..5a92bbdbe 100755
--- a/litex/boards/targets/kcu105.py
+++ b/litex/boards/targets/kcu105.py
@@ -10,6 +10,7 @@ import os
 import argparse
 
 from migen import *
+from migen.genlib.resetsync import AsyncResetSynchronizer
 
 from litex.boards.platforms import kcu105