diff --git a/constants/SP2000.inc b/constants/SP2000.inc
index 6ccca49..aa9bd9f 100644
--- a/constants/SP2000.inc
+++ b/constants/SP2000.inc
@@ -520,6 +520,7 @@ RESET_PAGE		EQU #A0
 ;---------------------------------------------------------------------[]
 SYS_PAGE		EQU #FE
 .ID_FLAG		EQU #C000                                       ; копия ID_SPRINTER для детекта полной инициализации. 32 bytes max 
+.ID_FLAG.Size		EQU #20
 ; vsync:
 ;  bit0 1 - 320L, 0 - 312L
 ;  bit1 1 - no waits, 0 - original waits