diff --git a/stingray/events.py b/stingray/events.py
index 3693373fd..0ee2b011b 100644
--- a/stingray/events.py
+++ b/stingray/events.py
@@ -15,7 +15,6 @@
 from .filters import get_deadtime_mask
 from .gti import generate_indices_of_boundaries
 from .io import load_events_and_gtis, pi_to_energy
-
 from .lightcurve import Lightcurve
 from .utils import simon, njit
 from .utils import histogram
diff --git a/stingray/io.py b/stingray/io.py
index 8ad449d5b..31c5ac39a 100644
--- a/stingray/io.py
+++ b/stingray/io.py
@@ -767,6 +767,7 @@ def load_events_and_gtis(
             returns.energy_list = rough_calibration(cal_pi, mission)
             logger.info(
                 f"A default calibration was applied to the {mission} data. "
+                "See io.rough_calibration for details. "
                 "Use the `rmf_file` argument in `EventList.read`, or calibrate with "
                 "`EventList.convert_pi_to_energy(rmf_file)`, if you want to apply a specific "
                 "response matrix"