diff --git a/wp-includes/general-template.php b/wp-includes/general-template.php
index 8ccb47c875..82228c2021 100644
--- a/wp-includes/general-template.php
+++ b/wp-includes/general-template.php
@@ -613,9 +613,14 @@ function wp_lostpassword_url( $redirect = '' ) {
 		$args['redirect_to'] = urlencode( $redirect );
 	}
 
-	$blog_details = get_blog_details();
+	$site_path = '';
 
-	$lostpassword_url = add_query_arg( $args, network_site_url( $blog_details->path . 'wp-login.php', 'login' ) );
+	if ( is_multisite() ) {
+		$blog_details = get_blog_details();
+		$site_path    = $blog_details->path . 'wp-login.php';
+	}
+
+	$lostpassword_url = add_query_arg( $args, network_site_url( $site_path . 'wp-login.php', 'login' ) );
 
 	/**
 	 * Filters the Lost Password URL.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 5294490b4a..f22fb2ca0a 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-beta4-48672';
+$wp_version = '5.5-beta4-48673';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.