diff --git a/changedetectionio/processors/restock_diff/forms.py b/changedetectionio/processors/restock_diff/forms.py
index 1ab01e6e..3b89d523 100644
--- a/changedetectionio/processors/restock_diff/forms.py
+++ b/changedetectionio/processors/restock_diff/forms.py
@@ -13,7 +13,8 @@ class processor_settings_form(processor_text_json_diff_form):
render_kw={"placeholder": "No limit", "size": "10"})
price_change_max = FloatField('Maximum amount to trigger notification', [validators.Optional()],
render_kw={"placeholder": "No limit", "size": "10"})
- price_change_threshold_percent = FloatField('Threshold in % for price changes', validators=[
+ price_change_threshold_percent = FloatField('Threshold in % for price changes since the original price', validators=[
+
validators.Optional(),
validators.NumberRange(min=0, max=100, message="Should be between 0 and 100"),
], render_kw={"placeholder": "0%", "size": "5"})
@@ -37,12 +38,13 @@ class processor_settings_form(processor_text_json_diff_form):