diff --git a/cv4/a_train.c b/cv4/a_train.c
index e4ca71c..fe22a14 100644
--- a/cv4/a_train.c
+++ b/cv4/a_train.c
@@ -4,12 +4,12 @@
 #include "a_train.h"
 
 struct car* add_car(struct car* first, const char* target){
-    if(!strcmp(target, "") && !first)
+    if(!strcmp(target, ""))
         return NULL;
 
     struct car* temp = first;
 
-    while(temp->next != NULL)
+    while(temp != NULL)
         temp = temp->next;
 
     temp->next = (struct car*)calloc(1, sizeof(struct car));