diff --git a/include/MainFilesystem.h b/include/MainFilesystem.h
index 68ccf22..28a521d 100644
--- a/include/MainFilesystem.h
+++ b/include/MainFilesystem.h
@@ -1,5 +1,5 @@
-#ifndef MAINFS_H
-#define MAINFS_H
+#ifndef MAINFILESYSTEM_H
+#define MAINFILESYSTEM_H
 
 #include "LittleFileSystem2.h"
 #include "mbed.h"