diff --git a/includes/Tache.hpp b/includes/Tache.hpp
index 563ec3a..83ee72a 100644
--- a/includes/Tache.hpp
+++ b/includes/Tache.hpp
@@ -4,6 +4,8 @@
 #include <iostream>
 
 class Tache {
+  static int unique_id;
+
   friend std::ostream &operator<<(std::ostream &, const Tache &);
 
 public:
diff --git a/src/Tache.cpp b/src/Tache.cpp
index e4f0d9c..fb2c5fe 100644
--- a/src/Tache.cpp
+++ b/src/Tache.cpp
@@ -1,10 +1,16 @@
 #include "../includes/Tache.hpp"
 
-Tache::Tache() { std::cout << "Hello, tache!\n"; }
+int Tache::unique_id = 0;
 
-Tache::~Tache() {}
+Tache::Tache() {
+  ++unique_id;
 
-Tache::Tache(const Tache &) {}
+  std::cout << "Hello, tache!\n";
+}
+
+Tache::~Tache() { --unique_id; }
+
+Tache::Tache(const Tache &) { ++unique_id; }
 
 const Tache &Tache::operator=(const Tache &src) {
   if (this == &src) {