diff --git a/api/openapi.yaml b/api/openapi.yaml
index 0270d9db3a..c7bb24cd84 100644
--- a/api/openapi.yaml
+++ b/api/openapi.yaml
@@ -98504,6 +98504,7 @@ components:
           allOf:
           - $ref: '#/components/schemas/NestedIPAddress'
           readOnly: true
+          nullable: true
         primary_ip4:
           allOf:
           - $ref: '#/components/schemas/NestedIPAddress'
@@ -99406,6 +99407,7 @@ components:
           allOf:
           - $ref: '#/components/schemas/NestedIPAddress'
           readOnly: true
+          nullable: true
         primary_ip4:
           allOf:
           - $ref: '#/components/schemas/NestedIPAddress'
@@ -131389,6 +131391,7 @@ components:
           allOf:
           - $ref: '#/components/schemas/NestedIPAddress'
           readOnly: true
+          nullable: true
         primary_ip4:
           allOf:
           - $ref: '#/components/schemas/NestedIPAddress'
diff --git a/scripts/fix-spec.py b/scripts/fix-spec.py
index e3e3f403b9..926763bdb8 100755
--- a/scripts/fix-spec.py
+++ b/scripts/fix-spec.py
@@ -19,9 +19,15 @@
                 if 'properties' in prop and 'value' in prop['properties'] and 'enum' in prop['properties']['value'] and None in prop['properties']['value']['enum']:
                     prop['properties']['value']['enum'].remove(None)
 
-            # Fix "parent_device" nullable type
-            if 'parent_device' in schema['properties']:
-                schema['properties']['parent_device']['nullable'] = True
+            # Fix nullable types
+            nullable_types = [
+                'parent_device',
+                'primary_ip',
+            ]
+
+            for ntype in nullable_types:
+                if ntype in schema['properties']:
+                    schema['properties'][ntype]['nullable'] = True
 
 # Save the spec file
 with open(SPEC_PATH, 'w') as file: