diff --git a/Swashbuckle.Core/Swagger/SwaggerGenerator.cs b/Swashbuckle.Core/Swagger/SwaggerGenerator.cs
index 471fef796..a92294630 100644
--- a/Swashbuckle.Core/Swagger/SwaggerGenerator.cs
+++ b/Swashbuckle.Core/Swagger/SwaggerGenerator.cs
@@ -188,14 +188,18 @@ private Parameter CreateParameter(string location, ApiParameterDescription param
             }
 
             parameter.required = location == "path" || !paramDesc.ParameterDescriptor.IsOptional;
-            parameter.@default = paramDesc.ParameterDescriptor.DefaultValue;
+            parameter.description = paramDesc.Documentation;
 
             var schema = schemaRegistry.GetOrRegister(paramDesc.ParameterDescriptor.ParameterType);
+
             if (parameter.@in == "body")
                 parameter.schema = schema;
             else
                 parameter.PopulateFrom(schema);
 
+            if (paramDesc.ParameterDescriptor.DefaultValue != null)
+                parameter.@default = paramDesc.ParameterDescriptor.DefaultValue;
+
             return parameter;
         }
     }
diff --git a/Swashbuckle.Core/Swagger/XmlComments/ApplyXmlActionComments.cs b/Swashbuckle.Core/Swagger/XmlComments/ApplyXmlActionComments.cs
index eb9d812bb..72fc52b14 100644
--- a/Swashbuckle.Core/Swagger/XmlComments/ApplyXmlActionComments.cs
+++ b/Swashbuckle.Core/Swagger/XmlComments/ApplyXmlActionComments.cs
@@ -69,8 +69,14 @@ private static void ApplyParamComments(Operation operation, XPathNavigator metho
                 if (actionParameter == null) continue;
 
                 var paramNode = methodNode.SelectSingleNode(string.Format(ParamXPath, actionParameter.Name));
+
                 if (paramNode != null)
-                    parameter.description = paramNode.ExtractContent();
+                {
+                    var description = paramNode.ExtractContent();
+
+                    if (!string.IsNullOrEmpty(description))
+                        parameter.description = description;
+                }
             }
         }
 
diff --git a/Swashbuckle.Dummy.Core/Controllers/XmlAnnotatedController.cs b/Swashbuckle.Dummy.Core/Controllers/XmlAnnotatedController.cs
index f576032c4..8184428c5 100644
--- a/Swashbuckle.Dummy.Core/Controllers/XmlAnnotatedController.cs
+++ b/Swashbuckle.Dummy.Core/Controllers/XmlAnnotatedController.cs
@@ -87,6 +87,13 @@ public void UpdateMetadata(int id, KeyValuePair<string, string>[] metadata)
         {
             throw new NotImplementedException();
         }
+
+        [HttpGet] 
+        [Route("GetById")] 
+        public void GetById(string id = "123456")
+        {
+            throw new NotImplementedException();
+        }
     }
 
     public class Page
diff --git a/Swashbuckle.Tests/Swagger/XmlCommentsTests.cs b/Swashbuckle.Tests/Swagger/XmlCommentsTests.cs
index 391eeb78e..84a99f7e9 100644
--- a/Swashbuckle.Tests/Swagger/XmlCommentsTests.cs
+++ b/Swashbuckle.Tests/Swagger/XmlCommentsTests.cs
@@ -224,6 +224,21 @@ public void It_does_not_clear_previously_added_responses()
             Assert.IsNotNull(responsesProperty["500"]);
         }
 
+        [Test]
+        public void It_documents_schema_default_parameters()
+        {
+            var swagger = GetContent<JObject>( "http://tempuri.org/swagger/docs/v1" );
+
+            var parameters = swagger["paths"]["/xmlannotated/GetById"]["get"]["parameters"];
+            Assert.IsNotNull( parameters );
+
+            Assert.IsNotNull( parameters.First["required"] );
+            Assert.AreEqual( "False", parameters.First["required"].ToString() );
+
+            Assert.IsNotNull( parameters.First["default"] );
+            Assert.AreEqual( "123456", parameters.First["default"].ToString() );
+        }
+
         private void IncludeXmlComments(SwaggerDocsConfig config)
         {
             config.IncludeXmlComments(String.Format(@"{0}\XmlComments.xml", AppDomain.CurrentDomain.BaseDirectory));