diff -Nru a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c	Thu May 13 09:58:24 2004
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c	Thu May 13 09:58:24 2004
@@ -32,7 +32,7 @@
 #include <asm/io.h>
 #include <asm/delay.h>
 
-#ifdef CONFIG_ACPI_PROCESSOR
+#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
 #include <linux/acpi.h>
 #include <acpi/processor.h>
 #endif
@@ -666,7 +696,7 @@
 	return -ENODEV;
 }
 
-#ifdef CONFIG_ACPI_PROCESSOR
+#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
 static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index)
 {
 	if (!data->acpi_data.state_count)
diff -Nru a/arch/i386/kernel/cpu/cpufreq/powernow-k8.h b/arch/i386/kernel/cpu/cpufreq/powernow-k8.h
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.h	Thu May 13 09:58:24 2004
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.h	Thu May 13 09:58:24 2004
@@ -29,7 +29,7 @@
 	 * frequency is in kHz */
 	struct cpufreq_frequency_table  *powernow_table;
 
-#ifdef CONFIG_ACPI_PROCESSOR
+#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
 	/* the acpi table needs to be kept. it's only available if ACPI was
 	 * used to determine valid frequency/vid/fid states */
 	struct acpi_processor_performance acpi_data;