diff --git a/option.go b/option.go
index a7f4f9a..95eaedc 100644
--- a/option.go
+++ b/option.go
@@ -79,13 +79,17 @@
 	// Determines if the option will be always quoted in the INI output
 	iniQuote bool
 
-	tag            multiTag
-	isSet          bool
-	preventDefault bool
+	tag                 multiTag
+	isSet, isSetDefault bool
+	preventDefault      bool
 
 	defaultLiteral string
 }
 
+func (option *Option) Field() reflect.Value {
+	return option.value
+}
+
 // LongNameWithNamespace returns the option's long name with the group namespaces
 // prepended by walking up the option's group tree. Namespaces and the long name
 // itself are separated by the parser's namespace delimiter. If the long name is
@@ -172,6 +176,11 @@
 	return option.isSet
 }
 
+// IsSetDefault returns true if option has been set with its default value.
+func (option *Option) IsSetDefault() bool {
+	return option.isSetDefault
+}
+
 // Set the value of an option to the specified value. An error will be returned
 // if the specified value could not be converted to the corresponding option
 // value type.
@@ -266,6 +275,7 @@
 
 		for _, d := range usedDefault {
 			option.set(&d)
+			option.isSetDefault = true
 		}
 	} else {
 		tp := option.value.Type()