diff --git a/openapi_spec_validator/validators.py b/openapi_spec_validator/validators.py
index cdd00cc..004ac36 100644
--- a/openapi_spec_validator/validators.py
+++ b/openapi_spec_validator/validators.py
@@ -111,18 +111,21 @@ class SchemaValidator(object):
     def __init__(self, dereferencer):
         self.dereferencer = dereferencer
 
-    def iter_errors(self, schema):
+    def iter_errors(self, schema, require_properties=True):
         schema_deref = self.dereferencer.dereference(schema)
 
         if 'allOf' in schema_deref:
             for inner_schema in schema_deref['allOf']:
-                for err in self.iter_errors(inner_schema):
+                for err in self.iter_errors(
+                    inner_schema,
+                    require_properties=False
+                ):
                     yield err
 
         required = schema_deref.get('required', [])
         properties = schema_deref.get('properties', {}).keys()
         extra_properties = list(set(required) - set(properties))
-        if extra_properties:
+        if extra_properties and require_properties:
             yield ExtraParametersError(
                 "Required list has not defined properties: {0}".format(
                     extra_properties
diff --git a/tests/integration/test_validators.py b/tests/integration/test_validators.py
index 1eee91b..4858fcc 100644
--- a/tests/integration/test_validators.py
+++ b/tests/integration/test_validators.py
@@ -82,6 +82,40 @@ def test_same_parameters_names(self, validator):
         errors_list = list(errors)
         assert errors_list == []
 
+    def test_allow_allof_required_no_properties(self, validator):
+        spec = {
+            'openapi': '3.0.0',
+            'info': {
+                'title': 'Test Api',
+                'version': '0.0.1',
+            },
+            'paths': {},
+            'components': {
+                'schemas': {
+                    'Credit': {
+                        'type': 'object',
+                        'properties': {
+                            'clientId': {'type': 'string'},
+                        }
+                    },
+                    'CreditCreate': {
+                        'allOf': [
+                            {
+                                '$ref': '#/components/schemas/Credit'
+                            },
+                            {
+                                'required': ['clientId']
+                            }
+                        ]
+                    }
+                },
+            },
+        }
+
+        errors = validator.iter_errors(spec)
+        errors_list = list(errors)
+        assert errors_list == []
+
     def test_extra_parameters_in_required(self, validator):
         spec = {
             'openapi': '3.0.0',