diff --git a/artiq/gateware/targets/sayma_rtm.py b/artiq/gateware/targets/sayma_rtm.py
index 338019044..979decaa3 100755
--- a/artiq/gateware/targets/sayma_rtm.py
+++ b/artiq/gateware/targets/sayma_rtm.py
@@ -94,7 +94,7 @@ class SaymaRTM(Module):
         csr_devices.append("clock_mux")
 
         # UART loopback
-        serial = platform.request(serial)
+        serial = platform.request("serial")
         self.comb += serial.tx.eq(serial.rx)
 
         # Allaki: enable RF output, GPIO access to attenuator