diff --git a/lib/Constants.php b/lib/Constants.php
index 42262e5e..650f5653 100644
--- a/lib/Constants.php
+++ b/lib/Constants.php
@@ -35,7 +35,7 @@ const DATABASE_DEFAULT_HOST = 		'localhost';
 const EBOOKS_PER_PAGE = 12;
 const EBOOKS_MAX_STRING_LENGTH = 250;
 const EBOOKS_MAX_LONG_STRING_LENGTH = 500;
-const EBOOK_SINGLE_PAGE_SIZE_WARNING = 3 *1024 * 1024; // 3145728
+const EBOOK_SINGLE_PAGE_SIZE_WARNING = 3 * 1024 * 1024; // 3145728 bytes.
 
 const ARTWORK_THUMBNAIL_HEIGHT = 350;
 const ARTWORK_THUMBNAIL_WIDTH = 350;