diff --git a/src/allmydata/scripts/tahoe_run.py b/src/allmydata/scripts/tahoe_run.py
index 51be32ee3..dfdc97ea5 100644
--- a/src/allmydata/scripts/tahoe_run.py
+++ b/src/allmydata/scripts/tahoe_run.py
@@ -179,7 +179,7 @@ class DaemonizeTheRealService(Service, HookMixin):
                         )
                     )
                 else:
-                    self.stderr.write("\nUnknown error\n")
+                    self.stderr.write("\nUnknown error, here's the traceback:\n")
                     reason.printTraceback(self.stderr)
                 reactor.stop()