diff --git a/malcolm/modules/pandablocks/controllers/pandablockcontroller.py b/malcolm/modules/pandablocks/controllers/pandablockcontroller.py
index 8604f1994..adb5843dd 100644
--- a/malcolm/modules/pandablocks/controllers/pandablockcontroller.py
+++ b/malcolm/modules/pandablocks/controllers/pandablockcontroller.py
@@ -230,6 +230,8 @@ def _make_parts_for(self, field_name, field_data):
             self._make_mux(field_name, field_data, Port.INT32)
         elif typ == "table":
             self._make_table(field_name, field_data)
+            for suffix in ("QUEUED_LINES",):
+                self.field_parts[f"{field_name}.{suffix}"] = None
         else:
             raise ValueError(f"Unknown type {typ!r} subtype {subtyp!r}")