diff --git a/src/wp-admin/includes/plugin.php b/src/wp-admin/includes/plugin.php
index 487df7f4f6..3a4b488127 100644
--- a/src/wp-admin/includes/plugin.php
+++ b/src/wp-admin/includes/plugin.php
@@ -2292,7 +2292,7 @@ function plugin_sandbox_scrape( $plugin ) {
 	}
 
 	wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $plugin );
-	include WP_PLUGIN_DIR . '/' . $plugin;
+	include_once WP_PLUGIN_DIR . '/' . $plugin;
 }
 
 /**