diff --git a/data/registers/mdios_v1.json b/data/registers/mdios_v1.json
index 547d9ea..ae64deb 100644
--- a/data/registers/mdios_v1.json
+++ b/data/registers/mdios_v1.json
@@ -54,7 +54,7 @@
           "len": 32,
           "stride": 4
         },
-        "byte_offset": 28,
+        "byte_offset": 256,
         "access": "Read",
         "fieldset": "DINR"
       },
@@ -65,7 +65,7 @@
           "len": 32,
           "stride": 4
         },
-        "byte_offset": 156,
+        "byte_offset": 384,
         "fieldset": "DOUTR"
       }
     ]