diff --git a/artiq/gateware/serwb/core.py b/artiq/gateware/serwb/core.py
index a49d7231c..f7e13acd5 100644
--- a/artiq/gateware/serwb/core.py
+++ b/artiq/gateware/serwb/core.py
@@ -33,16 +33,16 @@ class SERWBCore(Module):
             packetizer.source.connect(tx_fifo.sink),
             tx_fifo.source.connect(scrambler.sink),
             If(phy.init.ready,
-                If(scrambler.source.valid,
+                If(scrambler.source.stb,
                     phy.serdes.tx_k.eq(scrambler.source.k),
                     phy.serdes.tx_d.eq(scrambler.source.d)
                 ),
-                scrambler.source.ready.eq(phy.serdes.tx_ce)
+                scrambler.source.ack.eq(phy.serdes.tx_ce)
             ),
 
             # phy --> core
             If(phy.init.ready,
-                descrambler.sink.valid.eq(phy.serdes.rx_ce),
+                descrambler.sink.stb.eq(phy.serdes.rx_ce),
                 descrambler.sink.k.eq(phy.serdes.rx_k),
                 descrambler.sink.d.eq(phy.serdes.rx_d)
             ),