diff --git a/weblate/utils/db.py b/weblate/utils/db.py
index 340788e7dec0..85b860afac4b 100644
--- a/weblate/utils/db.py
+++ b/weblate/utils/db.py
@@ -9,7 +9,7 @@
 import time
 
 from django.db import ProgrammingError, connections, transaction
-from django.db.models.lookups import PatternLookup, Regex
+from django.db.models.lookups import Lookup, PatternLookup, Regex
 
 from .inv_regex import invert_re
 
@@ -59,7 +59,7 @@ def count_alnum(string):
     return sum(map(str.isalnum, string))
 
 
-class PostgreSQLFallbackLookupMixin:
+class PostgreSQLFallbackLookupMixin(Lookup):
     """
     Mixin to block PostgreSQL from using trigram index.
 
@@ -70,8 +70,6 @@ class PostgreSQLFallbackLookupMixin:
     It is performed by concatenating empty string which will prevent index usage.
     """
 
-    lookup_name: str
-
     def process_lhs(self, compiler, connection, lhs=None):
         if self._needs_fallback:  # type: ignore[attr-defined]
             lhs_sql, params = super().process_lhs(compiler, connection, lhs)  # type: ignore[misc]