diff --git a/kfet/forms.py b/kfet/forms.py
index bc98a8ce..6623ad0e 100644
--- a/kfet/forms.py
+++ b/kfet/forms.py
@@ -2,6 +2,7 @@ from datetime import timedelta
 from decimal import Decimal
 
 from django import forms
+from django.conf import settings
 from django.contrib.auth.models import User
 from django.core import validators
 from django.core.exceptions import ValidationError
@@ -484,7 +485,14 @@ class KFetConfigForm(ConfigForm):
 
 
 class FilterHistoryForm(forms.Form):
-    start = forms.DateTimeField(label=_("De"), widget=DateTimeWidget, required=False)
+    start = forms.DateTimeField(
+        label=_("De"),
+        widget=DateTimeWidget,
+        required=False,
+        help_text="L'historique est limité à {} jours".format(
+            settings.KFET_HISTORY_DATE_LIMIT.days
+        ),
+    )
     end = forms.DateTimeField(label=_("À"), widget=DateTimeWidget, required=False)
     checkout = forms.ModelChoiceField(
         label=_("Caisse"),