diff --git a/Documentation/power/regulator/regulator.txt b/Documentation/power/regulator/regulator.txt
index 3f8b528f237e..e272d9909e39 100644
--- a/Documentation/power/regulator/regulator.txt
+++ b/Documentation/power/regulator/regulator.txt
@@ -12,7 +12,7 @@ Drivers can register a regulator by calling :-
 
 struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
 	struct device *dev, struct regulator_init_data *init_data,
-	void *driver_data);
+	void *driver_data, struct device_node *of_node);
 
 This will register the regulators capabilities and operations to the regulator
 core.