diff --git a/sys/contrib/dev/acpica/hwregs.c b/sys/contrib/dev/acpica/hwregs.c
index 19cdb815d4fe..e4a55d3e6c6a 100644
--- a/sys/contrib/dev/acpica/hwregs.c
+++ b/sys/contrib/dev/acpica/hwregs.c
@@ -503,8 +503,8 @@ AcpiSetRegister (
         ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
                 BitRegInfo->AccessBitMask, Value);
 
-        Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, RegisterId,
-                (UINT16) RegisterValue);
+        Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
+                ACPI_REGISTER_PM1_CONTROL, (UINT16) RegisterValue);
         break;