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-rw-r--r--src/superio/winbond/w83977tf/acpi/superio.asl4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/superio/winbond/w83977tf/acpi/superio.asl b/src/superio/winbond/w83977tf/acpi/superio.asl
index 08d63da530..eda674449a 100644
--- a/src/superio/winbond/w83977tf/acpi/superio.asl
+++ b/src/superio/winbond/w83977tf/acpi/superio.asl
@@ -299,8 +299,8 @@ Device (ECP)
/* Report a second port range that is 0x400 above base port. */
CreateByteField (BUF6, 0x0B, I2HI)
CreateByteField (BUF6, 0x0D, I2RH)
- Add (I2HI, 0x04, I2RH)
- Add (I2HI, 0x04, I2HI)
+ I2RH = I2HI + 4
+ I2HI = I2HI + 4
EXIT_CONFIG_MODE()
Return (BUF6)
}