diff --git a/src/nominatim_api/core.py b/src/nominatim_api/core.py
index a71bca6e..f8941bcc 100644
--- a/src/nominatim_api/core.py
+++ b/src/nominatim_api/core.py
@@ -304,7 +304,7 @@ class NominatimAPIAsync:
             else:
                 details.restrict_min_max_rank(4, 4)
 
-            if 'layers' not in params:
+            if details.layers is None:
                 details.layers = ntyp.DataLayer.ADDRESS
                 if amenity:
                     details.layers |= ntyp.DataLayer.POI
diff --git a/src/nominatim_api/search/geocoder.py b/src/nominatim_api/search/geocoder.py
index 69455d77..8901529f 100644
--- a/src/nominatim_api/search/geocoder.py
+++ b/src/nominatim_api/search/geocoder.py
@@ -238,7 +238,7 @@ def _dump_searches(searches: List[AbstractSearch], query: QueryStruct,
         if not lk:
             return ''
 
-        return f"{lk.lookup_type}({lk.column}{tk(lk.tokens)})"
+        return f"{lk.lookup_type.__name__}({lk.column}{tk(lk.tokens)})"
 
     def fmt_cstr(c: Any) -> str:
         if not c: