diff --git a/tabbycat/adjfeedback/admin.py b/tabbycat/adjfeedback/admin.py
index 9d22d15339a..169bc793810 100644
--- a/tabbycat/adjfeedback/admin.py
+++ b/tabbycat/adjfeedback/admin.py
@@ -40,8 +40,10 @@ class Meta:
     def clean(self):
         integer_scale = AdjudicatorFeedbackQuestion.ANSWER_TYPE_INTEGER_SCALE
         if self.cleaned_data.get('answer_type') == integer_scale:
-            if not self.cleaned_data.get('min_value') or not self.cleaned_data.get('max_value'):
+            if self.cleaned_data.get('min_value') is None or self.cleaned_data.get('max_value') is None:
                 raise forms.ValidationError(_("Integer scales must have a minimum and maximum"))
+            if self.cleaned_data['max_value'] < self.cleaned_data['min_value']:
+                raise forms.ValidationError(_("Maximum value must be greater than the minimum"))
         return self.cleaned_data