diff --git a/drivers/watchdog/sp5100_tco.h b/drivers/watchdog/sp5100_tco.h
index 1af4dee71337..0e242d1110ce 100644
--- a/drivers/watchdog/sp5100_tco.h
+++ b/drivers/watchdog/sp5100_tco.h
@@ -55,7 +55,7 @@
 #define SB800_PM_WATCHDOG_CONFIG	0x4C
 
 #define SB800_PCI_WATCHDOG_DECODE_EN	(1 << 0)
-#define SB800_PM_WATCHDOG_DISABLE	(1 << 2)
+#define SB800_PM_WATCHDOG_DISABLE	(1 << 1)
 #define SB800_PM_WATCHDOG_SECOND_RES	(3 << 0)
 #define SB800_ACPI_MMIO_DECODE_EN	(1 << 0)
 #define SB800_ACPI_MMIO_SEL		(1 << 1)