diff --git a/cv5/a_train.c b/cv5/a_train.c
index 1b93459..38c951b 100644
--- a/cv5/a_train.c
+++ b/cv5/a_train.c
@@ -1,3 +1,7 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "a_train.h"
 
 struct car* add_car(struct car* first,const char* target) {