diff --git a/cv5/a_train.c b/cv5/a_train.c
index 9774063..e889bd1 100644
--- a/cv5/a_train.c
+++ b/cv5/a_train.c
@@ -31,11 +31,11 @@ void print_train(struct car* first) {
     }
 }
 
-void cancel_train(struct car* first, int val) {   
+void cancel_train(struct car* first) {   
     if(first == NULL){
         exit(0);
     }
-    else if(first->next == NULL){
+    if(first->value == NULL){
        struct car* this;
        this = first;
        first = this->next;