diff --git a/cv9/snake.c b/cv9/snake.c
index 00e921e..851e992 100644
--- a/cv9/snake.c
+++ b/cv9/snake.c
@@ -42,7 +42,7 @@ void free_snake(struct snake* sn){
 int is_snake(struct snake* snake,int x,int y){
     if(snake == NULL)
         return NULL;
-    if(x == snake->x && y == snake->y)
+    if(snake->x == x && snake->y == y)
         return 1;
     return 0;
 }