diff --git a/constants/SP2000.inc b/constants/SP2000.inc
index a0342e5..b5fac7f 100644
--- a/constants/SP2000.inc
+++ b/constants/SP2000.inc
@@ -532,7 +532,7 @@ DCP_PAGE		EQU #40
 SHARED_PAGE		EQU #FF
 ZERO_PAGE		EQU 0
 ZX_PAGE:
-.SLOT0			EQU 0
+.SLOT0			EQU ZERO_PAGE
 .SLOT1			EQU 5
 .SLOT2			EQU 2
 .SLOT3			EQU .SLOT0