diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h
index 1c16f821434f9c2ffee4ea793605800fa99a56b4..d98c67001840b705db746e4a1bc89ccba209652b 100644
--- a/include/acpi/acconfig.h
+++ b/include/acpi/acconfig.h
@@ -100,7 +100,9 @@
  *      ACPI PM timer
  *      FACS table (Waking vectors and Global Lock)
  */
+#ifndef ACPI_REDUCED_HARDWARE
 #define ACPI_REDUCED_HARDWARE           FALSE
+#endif
 
 /******************************************************************************
  *