diff --git a/src/fsfw/filesystem/HasFileSystemIF.h b/src/fsfw/filesystem/HasFileSystemIF.h
index 6f7112ad..24400b1c 100644
--- a/src/fsfw/filesystem/HasFileSystemIF.h
+++ b/src/fsfw/filesystem/HasFileSystemIF.h
@@ -40,6 +40,7 @@ class HasFileSystemIF {
   //! [EXPORT] : P1: Can be file system specific error code
   static constexpr ReturnValue_t GENERIC_FILE_ERROR = MAKE_RETURN_CODE(0);
   static constexpr ReturnValue_t GENERIC_DIR_ERROR = MAKE_RETURN_CODE(1);
+  static constexpr ReturnValue_t FILESYSTEM_INACTIVE = MAKE_RETURN_CODE(2);
   static constexpr ReturnValue_t GENERIC_RENAME_ERROR = MAKE_RETURN_CODE(3);
 
   //! [EXPORT] : File system is currently busy