diff --git a/django_sql_tagger/tagging.py b/django_sql_tagger/tagging.py
index cdb5cc3..06f42a2 100644
--- a/django_sql_tagger/tagging.py
+++ b/django_sql_tagger/tagging.py
@@ -7,7 +7,7 @@
 from types import FrameType, CodeType
 
 from django.conf import settings
-from django.db.models import QuerySet, Model
+from django.db.models import QuerySet, Model, Manager
 
 transaction_tag = threading.local()
 logger = logging.getLogger(__name__)
@@ -72,8 +72,8 @@ def sql_query_tagger(execute, sql, params, many, context):
             _cls = calling_frame.f_locals.get('cls')
             if (
                 (not is_code_ours(calling_frame.f_code))
-                or (isinstance(calling_frame.f_locals.get('self'), (QuerySet, Model)))
-                or (_cls and inspect.isclass(_cls) and issubclass(_cls, (QuerySet, Model)))
+                or (isinstance(calling_frame.f_locals.get('self'), (QuerySet, Model, Manager)))
+                or (_cls and inspect.isclass(_cls) and issubclass(_cls, (QuerySet, Model, Manager)))
             ):
                 calling_frame = calling_frame.f_back
             else: