diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index fc7565ce7e86861c111d7c6a09ca8ab7f411a475..18518ba13c81c6f30a7f136ff21cfb8d0381e343 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -78,6 +78,7 @@ firmware_timeout_show(struct class *class,
 /**
  * firmware_timeout_store - set number of seconds to wait for firmware
  * @class: device class pointer
+ * @attr: device attribute pointer
  * @buf: buffer to scan for timeout value
  * @count: number of bytes in @buf
  *