diff --git a/du7/snake.c b/du7/snake.c
index c600b67..2431a7d 100644
--- a/du7/snake.c
+++ b/du7/snake.c
@@ -64,7 +64,7 @@ void free_snake(struct snake* sn){
 int is_snake(struct snake* snake,int x,int y){
     struct snake* temp = snake;
 
-    while(temp->next != NULL){
+    while(temp != NULL){
         if(x == temp->x && y == temp->y){
             return 1;
         }