diff --git src/wp-content/themes/twentynineteen/inc/icon-functions.php src/wp-content/themes/twentynineteen/inc/icon-functions.php
index 76dba55094..d6f5722181 100644
--- src/wp-content/themes/twentynineteen/inc/icon-functions.php
+++ src/wp-content/themes/twentynineteen/inc/icon-functions.php
@@ -9,6 +9,9 @@
 
 /**
  * Gets the SVG code for a given icon.
+ * 
+ * @param string $icon The specific icon to retrieve.
+ * @param int    $size The desired width and height for the SVG icon.
  */
 function twentynineteen_get_icon_svg( $icon, $size = 24 ) {
 	return TwentyNineteen_SVG_Icons::get_svg( 'ui', $icon, $size );
@@ -16,6 +19,9 @@ function twentynineteen_get_icon_svg( $icon, $size = 24 ) {
 
 /**
  * Gets the SVG code for a given social icon.
+ * 
+ * @param string $icon The specific icon to retrieve.
+ * @param int    $size The desired width and height for the SVG icon.
  */
 function twentynineteen_get_social_icon_svg( $icon, $size = 24 ) {
 	return TwentyNineteen_SVG_Icons::get_svg( 'social', $icon, $size );
@@ -23,6 +29,9 @@ function twentynineteen_get_social_icon_svg( $icon, $size = 24 ) {
 
 /**
  * Detects the social network from a URL and returns the SVG code for its icon.
+ * 
+ * @param string $icon The specific icon to retrieve.
+ * @param int    $size The desired width and height for the SVG icon.
  */
 function twentynineteen_get_social_link_svg( $uri, $size = 24 ) {
 	return TwentyNineteen_SVG_Icons::get_social_link_svg( $uri, $size );
@@ -33,7 +42,6 @@ function twentynineteen_get_social_link_svg( $uri, $size = 24 ) {
  *
  * @param string   $item_output The menu item's starting HTML output.
  * @param WP_Post  $item        Menu item data object.
- * @param int      $depth       Depth of the menu. Used for padding.
  * @param stdClass $args        An object of wp_nav_menu() arguments.
  * @return string The menu item output with social icon.
  */
@@ -56,7 +64,6 @@ add_filter( 'walker_nav_menu_start_el', 'twentynineteen_nav_menu_social_icons',
  *
  * @param string   $item_output The menu item's starting HTML output.
  * @param WP_Post  $item        Menu item data object.
- * @param int      $depth       Depth of the menu. Used for padding.
  * @param stdClass $args        An object of wp_nav_menu() arguments.
  * @return string Nav menu item start element.
  */