diff --git a/include/ntfs/layout.h b/include/ntfs/layout.h
index 43fed781..f9f3ea7c 100644
--- a/include/ntfs/layout.h
+++ b/include/ntfs/layout.h
@@ -1988,7 +1988,7 @@ typedef enum {
 	VOLUME_REPAIR_OBJECT_ID		= const_cpu_to_le16(0x0020),
 	VOLUME_CHKDSK_UNDERWAY		= const_cpu_to_le16(0x4000),
 	VOLUME_MODIFIED_BY_CHKDSK	= const_cpu_to_le16(0x8000),
-	VOLUME_FLAGS_MASK		= const_cpu_to_le16(0x803f),
+	VOLUME_FLAGS_MASK		= const_cpu_to_le16(0xc03f),
 } __attribute__((__packed__)) VOLUME_FLAGS;
 
 /**