diff --git a/ldclient/impl/integrations/files/file_data_source.py b/ldclient/impl/integrations/files/file_data_source.py
index 81fb38d3..c6f86113 100644
--- a/ldclient/impl/integrations/files/file_data_source.py
+++ b/ldclient/impl/integrations/files/file_data_source.py
@@ -96,7 +96,7 @@ def _load_all(self):
                 log.error('Unable to load flag data from "%s": %s' % (path, repr(e)))
                 traceback.print_exc()
                 if self._data_source_update_sink is not None:
-                    self._data_source_update_sink.update_status(DataSourceState.INTERRUPTED, DataSourceErrorInfo(DataSourceErrorKind.INVALID_DATA, 0, time.time, str(e)))
+                    self._data_source_update_sink.update_status(DataSourceState.INTERRUPTED, DataSourceErrorInfo(DataSourceErrorKind.INVALID_DATA, 0, time.time(), str(e)))
                 return
         try:
             self._sink_or_store().init(all_data)
@@ -107,7 +107,7 @@ def _load_all(self):
             log.error('Unable to store data: %s' % repr(e))
             traceback.print_exc()
             if self._data_source_update_sink is not None:
-                self._data_source_update_sink.update_status(DataSourceState.INTERRUPTED, DataSourceErrorInfo(DataSourceErrorKind.UNKNOWN, 0, time.time, str(e)))
+                self._data_source_update_sink.update_status(DataSourceState.INTERRUPTED, DataSourceErrorInfo(DataSourceErrorKind.UNKNOWN, 0, time.time(), str(e)))
 
     def _load_file(self, path, all_data):
         content = None
diff --git a/ldclient/testing/test_file_error_timestamps.py b/ldclient/testing/test_file_error_timestamps.py
new file mode 100644
index 00000000..0c512933
--- /dev/null
+++ b/ldclient/testing/test_file_error_timestamps.py
@@ -0,0 +1,36 @@
+import time
+
+import pytest
+
+from ldclient import LDClient
+from ldclient.config import Config
+from ldclient.feature_store import InMemoryFeatureStore
+from ldclient.integrations import Files
+from ldclient.interfaces import DataSourceErrorKind
+
+
+class FailingFeatureStore(InMemoryFeatureStore):
+    def init(self, all_data):
+        raise RuntimeError('store unavailable')
+
+
+@pytest.mark.parametrize('failure', ['missing', 'malformed', 'store'])
+def test_file_source_reports_numeric_error_timestamp(tmp_path, failure):
+    path = tmp_path / 'flags.json'
+    if failure == 'malformed':
+        path.write_text('{"flagValues":{')
+    elif failure == 'store':
+        path.write_text('{"flagValues":{"flag":true}}')
+    store = FailingFeatureStore() if failure == 'store' else InMemoryFeatureStore()
+    started = time.time()
+    with LDClient(config=Config(
+        'SDK_KEY',
+        update_processor_class=Files.new_data_source(paths=str(path)),
+        feature_store=store,
+        send_events=False,
+    )) as client:
+        error = client.data_source_status_provider.status.error
+        assert error is not None
+        assert error.kind == (DataSourceErrorKind.UNKNOWN if failure == 'store' else DataSourceErrorKind.INVALID_DATA)
+        assert isinstance(error.time, float)
+        assert started <= error.time <= time.time()