diff --git a/src/Person.h b/src/Person.h
index a0a3ac9..2fd3a2a 100644
--- a/src/Person.h
+++ b/src/Person.h
@@ -5,6 +5,8 @@
 class Person
 {
 public:
+    Person();
+
     std::string getName() const;
     unsigned int getAge() const;