diff --git a/cv5/a_train.c b/cv5/a_train.c
index be8f372..0ec470b 100644
--- a/cv5/a_train.c
+++ b/cv5/a_train.c
@@ -68,7 +68,8 @@ struct car* clear_train(struct car* first, const char* target) {
             if(x == 0){ 
                 struct car* third = prev->next->next;
                 free(prev->next);
-                prev->next = third; 
+                prev->next = third;
+                third->next = NULL; 
                 return first;
             }
             prev = prev->next;
@@ -80,5 +81,6 @@ struct car* clear_train(struct car* first, const char* target) {
             return first;
  
         }
+    return first;
 
 }