diff --git a/du4/train.c b/du4/a_train.c
similarity index 100%
rename from du4/train.c
rename to du4/a_train.c
diff --git a/du4/train.h b/du4/a_train.h
similarity index 100%
rename from du4/train.h
rename to du4/a_train.h
diff --git a/du4/main.c b/du4/main.c
index dacf73b..6744c81 100644
--- a/du4/main.c
+++ b/du4/main.c
@@ -1,5 +1,5 @@
 #include <stdio.h>
-#include "train.h"
+#include "a_train.h"
 
 int main() {
     struct car* vlak = NULL;