diff --git a/du7/snake.c b/du7/snake.c
index c6a4296..6feb43f 100644
--- a/du7/snake.c
+++ b/du7/snake.c
@@ -1,5 +1,4 @@
 #include <stdlib.h>
-#include <stdlib.h>
 
 #include "snake.h"
 
@@ -100,7 +99,7 @@ int step_state(struct state* st){
         return END_FOOD;
 // 
     
-    if(nx<0||ny<0||nx>=COLS||ny>=LINES)
+    if(nx<0||ny<0||nx>=st->width||ny>=st->height)
         return END_WALL;
 //