diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index 677a132be242..a3d34e3f9f94 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -17,8 +17,6 @@
 #include <acpi/processor.h>
 #include <linux/uaccess.h>
 
-#define PREFIX "ACPI: "
-
 #ifdef CONFIG_CPU_FREQ
 
 /* If a passive cooling situation is detected, primarily CPUfreq is used, as it