diff --git a/artiq/gateware/drtio/link_layer.py b/artiq/gateware/drtio/link_layer.py
index bebc9dc7c..2b4b7b45b 100644
--- a/artiq/gateware/drtio/link_layer.py
+++ b/artiq/gateware/drtio/link_layer.py
@@ -273,5 +273,6 @@ class LinkLayer(Module, AutoCSR):
             If(wait_scrambler.done, NextState("READY"))
         )
         fsm.act("READY",
-            ready.eq(1)
+            ready.eq(1),
+            If(~self.rx_ready, NextState("WAIT_RX_READY"))
         )