diff --git a/src/chipset/opti5x7.c b/src/chipset/opti5x7.c
index 1b2d00798..1199c634f 100644
--- a/src/chipset/opti5x7.c
+++ b/src/chipset/opti5x7.c
@@ -56,7 +56,7 @@ Bits 0-1: x0000-x3FFF
 #define SHADOW_RECALC (((CURRENT_REGISTER & CAN_READ) ? MEM_READ_INTERNAL : MEM_READ_EXTANY) | ((CURRENT_REGISTER & CAN_WRITE) ? MEM_WRITE_INTERNAL : MEM_WRITE_EXTANY))
 
 /* Shadow Recalc for the E/F segments */
-#define SHADOW_EF_RECALC (((dev->regs[6] & CAN_READ) ? MEM_READ_INTERNAL : MEM_READ_EXTANY) | ((dev->regs[0x06] & CAN_WRITE) ? MEM_WRITE_INTERNAL : MEM_WRITE_EXTANY))
+#define SHADOW_EF_RECALC (((dev->regs[6] & CAN_READ) ? MEM_READ_INTERNAL : MEM_READ_EXTANY) | ((dev->regs[6] & CAN_WRITE) ? MEM_WRITE_INTERNAL : MEM_WRITE_EXTANY))
 
 typedef struct
 {