diff --git a/cv4/a_train.c b/cv4/a_train.c
index a4c58e5..f202840 100755
--- a/cv4/a_train.c
+++ b/cv4/a_train.c
@@ -79,7 +79,7 @@ struct car* clear_train(struct car* first, const char* target) {
 		return this;
 	}else if(strcmp(this->next->next->value, target) == 0){
 		free(this->next->next);
-		this->next=NULL;
+		this->next->next=NULL;
 		return this;
 	} 
 	return first;