diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index d3f0a62efcc1..ee68ac54c0d4 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -138,7 +138,7 @@ static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = {
 	{
 	set_no_mwait, "Extensa 5220", {
 	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-	DMI_MATCH(DMI_SYS_VENDOR, "ACER"),
+	DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 	DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
 	DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL},
 	{},