diff --git a/artiq/gateware/targets/kasli.py b/artiq/gateware/targets/kasli.py
index 5eaecbc24..e28ea61e5 100755
--- a/artiq/gateware/targets/kasli.py
+++ b/artiq/gateware/targets/kasli.py
@@ -511,7 +511,7 @@ class LUH(_StandaloneBase):
         eem.Sampler.add_std(self, 3, None, ttl_serdes_7series.Output_8X)
         eem.Urukul.add_std(self, 4, None, ttl_serdes_7series.Output_8X)
         eem.Urukul.add_std(self, 5, None, ttl_serdes_7series.Output_8X)
-        eem.Grabber.add_std(self, 6, None, ttl_simple.Output)
+        eem.Grabber.add_std(self, 6)
 
         for i in (1, 2):
             sfp_ctl = self.platform.request("sfp_ctl", i)