diff --git a/domains/forms.py b/domains/forms.py
index 8c37daf..dd3cc9d 100644
--- a/domains/forms.py
+++ b/domains/forms.py
@@ -29,7 +29,7 @@ class DomainForm(MntFormMixin, WhoisObjectFormMixin, forms.ModelForm):
 			self.fields['name'].disabled = True
 			self.fields['nameservers'].queryset |= self.instance.nameservers.all()
 
-		self.fields['nameservers'].queryset.distinct()
+		self.fields['nameservers'].queryset  = self.fields['nameservers'].queryset.distinct()
 
 	def clean_name(self):
 		name = self.cleaned_data['name'].lower()
@@ -163,7 +163,7 @@ class ReverseZoneForm(forms.ModelForm):
 			self.fields['prefix'].disabled = True
 			self.fields['nameservers'].queryset |= self.instance.nameservers.all()
 
-		self.fields['nameservers'].queryset.distinct()
+		self.fields['nameservers'].queryset = self.fields['nameservers'].queryset.distinct()
 
 	def clean(self):
 		cleaned_data = super(ReverseZoneForm, self).clean()