diff --git a/regs/gen/maple_data_format.py b/regs/gen/maple_data_format.py
index 4be5c48..264a916 100644
--- a/regs/gen/maple_data_format.py
+++ b/regs/gen/maple_data_format.py
@@ -109,8 +109,10 @@ def render_format(format):
             yield f"uint8_t {field_name};"
         elif len(subfields) == 2:
             yield f"uint16_t {field_name};"
+        elif len(subfields) == 6:
+            yield f"uint8_t {field_name}[6];"
         else:
-            assert False, len(subfields)
+            assert False, (len(subfields), field_name)
 
     yield "};"
     assert format.size % 4 == 0, format.size
diff --git a/regs/maple_bus_ft6.ods b/regs/maple_bus_ft6.ods
index c4c51d5..a847423 100644
Binary files a/regs/maple_bus_ft6.ods and b/regs/maple_bus_ft6.ods differ