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-rw-r--r--src/superio/nuvoton/common/early_serial.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/superio/nuvoton/common/early_serial.c b/src/superio/nuvoton/common/early_serial.c
index cc21f40d2a..ed5fdbab1f 100644
--- a/src/superio/nuvoton/common/early_serial.c
+++ b/src/superio/nuvoton/common/early_serial.c
@@ -55,7 +55,7 @@ void nuvoton_enable_serial(pnp_devfn_t dev, u16 iobase)
if (CONFIG(SUPERIO_NUVOTON_NCT5539D_COM_A) ||
CONFIG(SUPERIO_NUVOTON_NCT6776_COM_A))
/* Route COM A to GPIO8 pin group */
- pnp_write_config(dev, 0x2a, 0x40);
+ pnp_unset_and_set_config(dev, 0x2a, 1 << 7, 0);
if (CONFIG(SUPERIO_NUVOTON_NCT6791D_COM_A))
/* Route COM A to GPIO8 pin group */