diff --git a/src/wp-admin/includes/class-wp-upgrader.php b/src/wp-admin/includes/class-wp-upgrader.php
index a2cea37917..d3788c906c 100644
--- a/src/wp-admin/includes/class-wp-upgrader.php
+++ b/src/wp-admin/includes/class-wp-upgrader.php
@@ -189,6 +189,7 @@ class WP_Upgrader {
 		$this->strings['fs_unavailable']    = __( 'Could not access filesystem.' );
 		$this->strings['fs_error']          = __( 'Filesystem error.' );
 		$this->strings['fs_no_root_dir']    = __( 'Unable to locate WordPress root directory.' );
+		/* translators: %s: Directory name. */
 		$this->strings['fs_no_content_dir'] = sprintf( __( 'Unable to locate WordPress content directory (%s).' ), 'wp-content' );
 		$this->strings['fs_no_plugins_dir'] = __( 'Unable to locate WordPress plugin directory.' );
 		$this->strings['fs_no_themes_dir']  = __( 'Unable to locate WordPress theme directory.' );
diff --git a/src/wp-includes/update.php b/src/wp-includes/update.php
index 1d2f55fbef..350182b2ce 100644
--- a/src/wp-includes/update.php
+++ b/src/wp-includes/update.php
@@ -1119,7 +1119,11 @@ function _wp_delete_all_temp_backups() {
 	}
 
 	if ( ! $wp_filesystem->wp_content_dir() ) {
-		return new WP_Error( 'fs_no_content_dir', __( 'Unable to locate WordPress content directory (wp-content).' ) );
+		return new WP_Error(
+			'fs_no_content_dir',
+			/* translators: %s: Directory name. */
+			sprintf( __( 'Unable to locate WordPress content directory (%s).' ), 'wp-content' )
+		);
 	}
 
 	$temp_backup_dir = $wp_filesystem->wp_content_dir() . 'upgrade-temp-backup/';