diff --git a/cargoentity.cpp b/cargoentity.cpp
index 1b63d35..272e9ba 100644
--- a/cargoentity.cpp
+++ b/cargoentity.cpp
@@ -1,6 +1,6 @@
 #include "cargoentity.h"
 
-CargoEntity::CargoEntity(QString c_id, DeliveryPointEntity dest)
+CargoEntity::CargoEntity(QString c_id, DeliveryPointEntity *dest)
 {
     this->_cargo_id = c_id;
     this->_destination = dest;
diff --git a/cargoentity.h b/cargoentity.h
index a682774..ae3e9be 100644
--- a/cargoentity.h
+++ b/cargoentity.h
@@ -6,13 +6,16 @@
 #include <QString>
 
 
+class DeliveryPointEntity;
+class StorageEntity;
 class CargoEntity
 {
     QString _cargo_id;
-    DeliveryPointEntity _destination;
+    DeliveryPointEntity *_destination;
 
 public:
-    CargoEntity(QString _cargo_id, DeliveryPointEntity _destination);
+    CargoEntity();
+    CargoEntity(QString _cargo_id, DeliveryPointEntity *_destination);
 };
 
 #endif // CARGOENTITY_H
diff --git a/deliverypointentity.h b/deliverypointentity.h
index 6cb566f..e8ab27e 100644
--- a/deliverypointentity.h
+++ b/deliverypointentity.h
@@ -7,12 +7,15 @@
 #include <vector>
 
 
+class CargoEntity;
+class StorageEntity;
 class DeliveryPointEntity
 {
     QString _title;
     std::vector<StorageEntity> _storage;
 
 public:
+    DeliveryPointEntity();
     DeliveryPointEntity(QString title);
 };
 
diff --git a/storageentity.h b/storageentity.h
index 5ec6d36..de7cbaa 100644
--- a/storageentity.h
+++ b/storageentity.h
@@ -5,7 +5,8 @@
 
 #include <vector>
 
-
+class DeliveryPointEntity;
+class CargoEntity;
 class StorageEntity
 {
     int _storage_id;
@@ -13,6 +14,7 @@ class StorageEntity
     std::vector<CargoEntity> _cargo;
 
 public:
+    StorageEntity();
     StorageEntity(int st_id, int mx_cap);
 };