diff --git a/src/7.in_practice/3.2d_game/0.full_source/progress/4.game.cpp b/src/7.in_practice/3.2d_game/0.full_source/progress/4.game.cpp
index e9576b1..9aafcd9 100644
--- a/src/7.in_practice/3.2d_game/0.full_source/progress/4.game.cpp
+++ b/src/7.in_practice/3.2d_game/0.full_source/progress/4.game.cpp
@@ -9,7 +9,7 @@
 #include "game.h"
 #include "resource_manager.h"
 #include "sprite_renderer.h"
-
+#include "game_object.h"
 
 // Game-related State data
 SpriteRenderer  *Renderer;