diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index 0d94be8531b5db9f583efdeaf55bd05ba78fc7db..f2429094b9b9e062a8c33765140417ae95ecaa62 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -106,7 +106,8 @@
 #define ACPI_FLUSH_CPU_CACHE()
 #define ACPI_CAST_PTHREAD_T(pthread) ((acpi_thread_id) (pthread))
 
-#if defined(__ia64__) || defined(__x86_64__) || defined(__aarch64__)
+#if defined(__ia64__)    || defined(__x86_64__) ||\
+	defined(__aarch64__) || defined(__PPC64__)
 #define ACPI_MACHINE_WIDTH          64
 #define COMPILER_DEPENDENT_INT64    long
 #define COMPILER_DEPENDENT_UINT64   unsigned long