diff --git a/controllers/main.py b/controllers/main.py
index 1b93b4e49a8416d85473c2c8a552333ceab48d7a..83c10cb58970817f11600dfcc8942f14ba407d2f 100644
--- a/controllers/main.py
+++ b/controllers/main.py
@@ -201,7 +201,7 @@ class CustomerPortal(CustomerPortal):
         ):
             raise werkzeug.exceptions.abort(werkzeug.wrappers.Response(status=401))
         if graph_type == "repartition_data":
-            vals = operation.get_repartition_data(
+            vals = operation._get_repartition_data(
                 start_date, end_date, partner_id, prm_id
             )
         else:
diff --git a/models/acc_operation.py b/models/acc_operation.py
index 276097b27bda82ea5af74c938c3ded130179af56..b0f846d62fa8d224e6d65f8a23bc3e17352d021b 100644
--- a/models/acc_operation.py
+++ b/models/acc_operation.py
@@ -88,7 +88,7 @@ class AccOperation(models.Model):
 
         return display_hourly_curves, step, step_display_curve
 
-    def get_repartition_data(
+    def _get_repartition_data(
         self,
         start_date,
         end_date,