diff --git a/drivers/of/base.c b/drivers/of/base.c
index 4cba021c89d3e..7dc394255a0a1 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -648,6 +648,7 @@ EXPORT_SYMBOL(of_get_next_child);
  * of_get_next_child_with_prefix - Find the next child node with prefix
  * @node:	parent node
  * @prev:	previous child of the parent node, or NULL to get first
+ * @prefix:	prefix that the node name should have
  *
  * This function is like of_get_next_child(), except that it automatically
  * skips any nodes whose name doesn't have the given prefix.