diff --git a/src/wp-admin/includes/plugin.php b/src/wp-admin/includes/plugin.php
index 25f6828787..5178c9b60c 100644
--- a/src/wp-admin/includes/plugin.php
+++ b/src/wp-admin/includes/plugin.php
@@ -1003,7 +1003,7 @@ function uninstall_plugin($plugin) {
 		unset($uninstallable_plugins);
 
 		define('WP_UNINSTALL_PLUGIN', $file);
-		wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . dirname( $file ) );
+		wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $file );
 		include( WP_PLUGIN_DIR . '/' . dirname($file) . '/uninstall.php' );
 
 		return true;