diff --git a/firmware/applications/final/nickname.c b/firmware/applications/final/nickname.c
index 9f62162..a14fab6 100644
--- a/firmware/applications/final/nickname.c
+++ b/firmware/applications/final/nickname.c
@@ -12,6 +12,7 @@
 #include "filesystem/ff.h"
 #include "filesystem/select.h"
 #include "filesystem/execute.h"
+#include "filesystem/util.h"
 
 #include <string.h>
 
diff --git a/firmware/filesystem/util.h b/firmware/filesystem/util.h
new file mode 100644
index 0000000..c522395
--- /dev/null
+++ b/firmware/filesystem/util.h
@@ -0,0 +1,10 @@
+#ifndef _UTIL_H
+#define _UTIL_H 1
+
+void fsInit();
+void fsReInit();
+int readFile(char * filename, char * data, int len);
+int readTextFile(char * filename, char * data, int len);
+int writeFile(char * filename, char * data, int len);
+
+#endif /* _UTIL_H */