diff --git a/pillar/api/custom_field_validation.py b/pillar/api/custom_field_validation.py
index e4d0f9db..1decfb85 100644
--- a/pillar/api/custom_field_validation.py
+++ b/pillar/api/custom_field_validation.py
@@ -143,7 +143,7 @@ class ValidateCustomFields(Validator):
         if not value:
             self._error(field, "Value is required once the document was created")
 
-    def _validate_type_iprange(self, field_name: str, value: str):
+    def _validator_iprange(self, field_name: str, value: str):
         """Ensure the field contains a valid IP address.
 
         Supports both IPv6 and IPv4 ranges. Requires the IPy module.
diff --git a/pillar/api/eve_settings.py b/pillar/api/eve_settings.py
index 40b259db..6c93c5c6 100644
--- a/pillar/api/eve_settings.py
+++ b/pillar/api/eve_settings.py
@@ -227,7 +227,7 @@ organizations_schema = {
                 'start': {'type': 'binary', 'required': True},
                 'end': {'type': 'binary', 'required': True},
                 'prefix': {'type': 'integer', 'required': True},
-                'human': {'type': 'iprange', 'required': True},
+                'human': {'type': 'string', 'required': True, 'validator': 'iprange'},
             }
         },
     },
diff --git a/tests/test_api/test_cerberus.py b/tests/test_api/test_cerberus.py
index 54dee688..d0079229 100644
--- a/tests/test_api/test_cerberus.py
+++ b/tests/test_api/test_cerberus.py
@@ -173,7 +173,7 @@ class NodeValidationTest(ValidationTest):
 
 
 class IPRangeValidatorTest(ValidationTest):
-    schema = {'iprange': {'type': 'iprange', 'required': True}}
+    schema = {'iprange': {'type': 'string', 'required': True, 'validator': 'iprange'}}
 
     def assertValid(self, document, schema=None):
         return super().assertValid(document, schema or self.schema)
@@ -199,3 +199,11 @@ class IPRangeValidatorTest(ValidationTest):
         self.assertValid({'iprange': '127.0.0.0/8'})
         self.assertInvalid({'iprange': '127.0.0.0/0'})
         self.assertInvalid({'iprange': 'garbled'})
+
+    def test_descriptive_error_message(self):
+        is_valid = self.validator.validate({'iprange': '::/0'}, self.schema)
+        self.assertFalse(is_valid)
+        self.assertEquals(1, len(self.validator._errors))
+        err = self.validator._errors[0]
+        self.assertEquals(('iprange', ), err.document_path)
+        self.assertEquals(('Zero-length prefix is not allowed',), err.info)