diff --git a/machines/serializers.py b/machines/serializers.py
index 40c38a72..e9fdde29 100644
--- a/machines/serializers.py
+++ b/machines/serializers.py
@@ -22,7 +22,7 @@ class InterfaceSerializer(serializers.ModelSerializer):
         fields = ('ipv4', 'mac_address', 'dns')
 
 class ExtensionNameField(serializers.RelatedField):
-    def to_reprsentation(self, value):
+    def to_representation(self, value):
         return value.name
 
 class TypeSerializer(serializers.ModelSerializer):
@@ -32,13 +32,7 @@ class TypeSerializer(serializers.ModelSerializer):
         model = IpType
         fields = ('type', 'extension', 'domaine_ip', 'domaine_range')
 
-class IpList_ExtensionField(serializers.RelatedField):
-    def to_representation(self, value):
-        return value.ipv4.ip_type.extension.name
-
 class InterfaceDNS_ExtensionSerializer(serializers.ModelSerializer):
-    ipv4 = IpList_ExtensionField(read_only=True)
-
     class Meta:
         model = Interface
         fields = ('ipv4', 'dns')
diff --git a/machines/views.py b/machines/views.py
index 8e66c1d3..d7abcada 100644
--- a/machines/views.py
+++ b/machines/views.py
@@ -469,12 +469,14 @@ def interface_list(request):
 @login_required
 @permission_required('serveur')
 def alias(request):
-    aliass = Alias.objects.all()
-    alias = []
-    for a in aliass:
-        if a.interface_parent.ipv4:
-            alias.append(a)
+    alias = Alias.objects.all()
     seria = AliasSerializer(alias, many=True)
+    for d in seria.data:
+        if d["interface_parent"]["ipv4"]:
+            id = d["interface_parent"]["ipv4"]
+            ip_list = IpList.objects.get(pk=id)
+            d["interface_parent"]["extension"] = ip_list.ip_type.extension.name
+            d["interface_parent"].pop("ipv4")
     return JSONResponse(seria.data)
 
 @csrf_exempt