diff --git a/src/wp-includes/ms-functions.php b/src/wp-includes/ms-functions.php
index 6f9ba85006f59..fa8df6d10875b 100644
--- a/src/wp-includes/ms-functions.php
+++ b/src/wp-includes/ms-functions.php
@@ -341,7 +341,7 @@ function get_blog_id_from_url( $domain, $path = '/' ) {
 	$path   = strtolower( $path );
 	$id     = wp_cache_get( md5( $domain . $path ), 'blog-id-cache' );
 
-	if ( -1 == $id ) { // Blog does not exist.
+	if ( -1 === $id ) { // Blog does not exist.
 		return 0;
 	} elseif ( $id ) {
 		return (int) $id;