diff --git a/src/System.cpp b/src/System.cpp
index 7bbd805..ecabb37 100644
--- a/src/System.cpp
+++ b/src/System.cpp
@@ -21,6 +21,7 @@
 #define FPS 60
 
 #include "System.hpp"
+#include <iostream>
 
 std::unique_ptr<Logger> System::logger;
 
@@ -180,9 +181,9 @@ void System::run() {
 			asset_mngr.getModel("sphere")->draw(shaders.at("default"));
 		}
 
-		for(unsigned int i = 0; i < 3; ++i)
+		for(int i = 0; i < 3; ++i)
 		{
-			for(unsigned int j = 0; j < 3; ++j)
+			for(int j = 0; j < 3; ++j)
 			{
 				if(board[i][j] not_eq 0)
 				{
@@ -254,6 +255,7 @@ void System::handleKey(SDL_Keysym key){
 			break;
 	}
 }
+
 void System::syncInputs() {
 	SDL_Event e;
 	while(SDL_PollEvent(&e))