diff --git a/roa1master.json b/roa1master.json
index ba7fdf3..6607b44 100644
--- a/roa1master.json
+++ b/roa1master.json
@@ -73,6 +73,7 @@
           "type": "mirny",
           "hw_rev": "v1.1",
           "ports": [10],
+          "refclk": 125e6,
           "clk_sel": "mmcx"
         },
         {