diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index b01180e1f578..db709d30bf84 100644
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -614,6 +614,7 @@ EXPORT_SYMBOL_GPL(genphy_c45_loopback);
 /**
  * genphy_c45_fast_retrain - configure fast retrain registers
  * @phydev: target phy_device struct
+ * @enable: enable fast retrain or not
  *
  * Description: If fast-retrain is enabled, we configure PHY as
  *   advertising fast retrain capable and THP Bypass Request, then