diff --git a/src/wp-admin/load-styles.php b/src/wp-admin/load-styles.php
index 083c3832eb8cb..3bdfcc7a22ac5 100644
--- a/src/wp-admin/load-styles.php
+++ b/src/wp-admin/load-styles.php
@@ -55,7 +55,7 @@
 $wp_styles = new WP_Styles();
 wp_default_styles( $wp_styles );
 
-$etag = $wp_styles->get_etag( $wp_version, $load );
+$etag = $wp_styles->get_etag( $load );
 
 if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) && stripslashes( $_SERVER['HTTP_IF_NONE_MATCH'] ) === $etag ) {
 	header( "$protocol 304 Not Modified" );