diff --git a/changelog.d/8278.bugfix b/changelog.d/8278.bugfix
new file mode 100644
index 0000000000..50e40ca2a9
--- /dev/null
+++ b/changelog.d/8278.bugfix
@@ -0,0 +1 @@
+Fix a bug which cause the logging system to report errors, if `DEBUG` was enabled and no `context` filter was applied.
diff --git a/synapse/logging/utils.py b/synapse/logging/utils.py
index fea774e2e5..becf66dd86 100644
--- a/synapse/logging/utils.py
+++ b/synapse/logging/utils.py
@@ -29,11 +29,11 @@ def _log_debug_as_f(f, msg, msg_args):
         lineno = f.__code__.co_firstlineno
         pathname = f.__code__.co_filename
 
-        record = logging.LogRecord(
+        record = logger.makeRecord(
             name=name,
             level=logging.DEBUG,
-            pathname=pathname,
-            lineno=lineno,
+            fn=pathname,
+            lno=lineno,
             msg=msg,
             args=msg_args,
             exc_info=None,