diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index 53345db..0622ace0 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -1255,7 +1255,7 @@
 	if (state_val >= pr->throttling.state_count)
 		return -EINVAL;
 
-	snprintf(tmpbuf, 5, "%d", state_val);
+	snprintf(tmpbuf, 5, "%zu", state_val);
 
 	if (strcmp(tmpbuf, charp) != 0)
 		return -EINVAL;