diff --git a/src/contactmanager.h b/src/contactmanager.h
index 6b7d3c8..0bf623f 100644
--- a/src/contactmanager.h
+++ b/src/contactmanager.h
@@ -1,11 +1,12 @@
 #ifndef CONTACTMANAGER_H
 #define CONTACTMANAGER_H
 
+#include "network.hpp"
 
 class ContactManager
 {
-public:
-    ContactManager();
+private:
+    sendPing(QHostAddress ip);
 };
 
 #endif // CONTACTMANAGER_H
\ No newline at end of file