diff --git a/artiq/gateware/test/suservo/test_dds.py b/artiq/gateware/test/suservo/test_dds.py
index e8c221f51..bef67d430 100644
--- a/artiq/gateware/test/suservo/test_dds.py
+++ b/artiq/gateware/test/suservo/test_dds.py
@@ -79,7 +79,7 @@ def main():
     data = []
     run_simulation(tb, [tb.log(data), run(tb)], vcd_name="dds.vcd")
 
-    assert data[-1][1] == [[0xe, 0x40 | i, 0x30 | i, 0x20 | i] for i in
+    assert data[-1][1] == [[0x15, 0x40 | i, 0x30 | i, 0x20 | i] for i in
             range(4)]