diff --git a/flexmeasures/data/models/charts/belief_charts.py b/flexmeasures/data/models/charts/belief_charts.py
index d9af65fa0..5242789c5 100644
--- a/flexmeasures/data/models/charts/belief_charts.py
+++ b/flexmeasures/data/models/charts/belief_charts.py
@@ -458,7 +458,7 @@ def chart_for_multiple_sensors(
         # Set up shared tooltip
         shared_tooltip = [
             dict(
-                field="sensor.name",
+                field="sensor.description",
                 type="nominal",
                 title="Sensor",
             ),