diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index a56fc6c..3097b75 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -274,7 +274,7 @@
 static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
 {
 	acpi_status status = 0;
-	unsigned long tpc = 0;
+	unsigned long long tpc = 0;
 
 	if (!pr)
 		return -EINVAL;