diff --git a/tensorboard/plugins/projector/projector_plugin.py b/tensorboard/plugins/projector/projector_plugin.py
index 223dfbb48ac..6810565e745 100644
--- a/tensorboard/plugins/projector/projector_plugin.py
+++ b/tensorboard/plugins/projector/projector_plugin.py
@@ -342,9 +342,11 @@ def configs(self):
         """Returns a map of run paths to `ProjectorConfig` protos."""
         run_path_pairs = list(self.run_paths.items())
         self._append_plugin_asset_directories(run_path_pairs)
-        # If there are no summary event files, the projector should still work,
-        # treating the `logdir` as the model checkpoint directory.
-        if not run_path_pairs:
+        # Also accept the root logdir as a model checkpoint directory,
+        # so that the projector still works when there are no runs.
+        # (Case on `run` rather than `path` to avoid issues with
+        # absolute/relative paths on any filesystems.)
+        if not any(run == "." for (run, path) in run_path_pairs):
             run_path_pairs.append((".", self.logdir))
         if self._run_paths_changed() or _latest_checkpoints_changed(
             self._configs, run_path_pairs