diff --git a/constants/dss_equ.inc b/constants/dss_equ.inc
index 55cabd4..390d0f5 100644
--- a/constants/dss_equ.inc
+++ b/constants/dss_equ.inc
@@ -30,6 +30,7 @@ FAT_ATTR:
 .NoVolID	EQU .READ_ONLY + .HIDDEN + .DIRECTORY + .ARCHIVE + .SYSTEM
 .NoSYSnoVolID	EQU .READ_ONLY + .HIDDEN + .DIRECTORY + .ARCHIVE	  
 .HiddenSysDir	EQU 	       + .HIDDEN + .DIRECTORY + 	 + .SYSTEM
+.ItIsVolID	EQU			   .DIRECTORY +		 + .VOLUME_ID
 ;
 .LFS_Entry	EQU .READ_ONLY + .HIDDEN + .SYSTEM + .VOLUME_ID
 .LFS_Entry_Mask	EQU %0011'1111