diff --git a/litex_boards/targets/alveo_u250.py b/litex_boards/targets/alveo_u250.py
index 1cd0a2b..2dc1e46 100755
--- a/litex_boards/targets/alveo_u250.py
+++ b/litex_boards/targets/alveo_u250.py
@@ -11,6 +11,7 @@
 import argparse, os
 
 from migen import *
+from migen.genlib.resetsync import AsyncResetSynchronizer
 
 from litex_boards.platforms import alveo_u250
 
diff --git a/litex_boards/targets/kcu105.py b/litex_boards/targets/kcu105.py
index 9668934..a2eacfa 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
 
diff --git a/litex_boards/targets/mercury_xu5.py b/litex_boards/targets/mercury_xu5.py
index 8a77494..b300af8 100755
--- a/litex_boards/targets/mercury_xu5.py
+++ b/litex_boards/targets/mercury_xu5.py
@@ -10,7 +10,7 @@ import os
 import argparse
 
 from migen import *
-from migen.genlib.io import CRG
+from migen.genlib.resetsync import AsyncResetSynchronizer
 
 from litex_boards.platforms import mercury_xu5
 
diff --git a/litex_boards/targets/vcu118.py b/litex_boards/targets/vcu118.py
index c1deb57..d63dabc 100755
--- a/litex_boards/targets/vcu118.py
+++ b/litex_boards/targets/vcu118.py
@@ -11,6 +11,7 @@ import os
 import argparse
 
 from migen import *
+from migen.genlib.resetsync import AsyncResetSynchronizer
 
 from litex_boards.platforms import vcu118
 
diff --git a/litex_boards/targets/xcu1525.py b/litex_boards/targets/xcu1525.py
index dab99e5..014b131 100755
--- a/litex_boards/targets/xcu1525.py
+++ b/litex_boards/targets/xcu1525.py
@@ -10,6 +10,7 @@ import os
 import argparse
 
 from migen import *
+from migen.genlib.resetsync import AsyncResetSynchronizer
 
 from litex_boards.platforms import xcu1525
 
diff --git a/litex_boards/targets/zcu104.py b/litex_boards/targets/zcu104.py
index 3187864..aa7a5e3 100755
--- a/litex_boards/targets/zcu104.py
+++ b/litex_boards/targets/zcu104.py
@@ -11,6 +11,7 @@ import os
 import argparse
 
 from migen import *
+from migen.genlib.resetsync import AsyncResetSynchronizer
 
 from litex_boards.platforms import zcu104