diff --git a/functions.php b/functions.php
index 68efb4c59..3378d7fd7 100644
--- a/functions.php
+++ b/functions.php
@@ -451,7 +451,7 @@ function dones_assign_done_tags( $post_id, $post ) {
  * @return string $url Site icon URL, or default value
  */
 function dones_default_site_icon( $url, $size ) {
-	$icon_sizes = array( '32', '180', '192', '270', '512' );
+	$icon_sizes = array( 32, 180, 192, 270, 512 );
 	if ( empty( $url ) && in_array( $size, $icon_sizes ) ) {
 		return get_theme_file_uri( sprintf( '/img/icon-%d.png', $size ) );
 	}