Index: wp-admin/includes/class-wp-upgrader.php
===================================================================
--- wp-admin/includes/class-wp-upgrader.php	(revision 14305)
+++ wp-admin/includes/class-wp-upgrader.php	(working copy)
@@ -1214,6 +1214,9 @@
 			'activate_plugin' => '<a href="' . wp_nonce_url('plugins.php?action=activate&amp;plugin=' . $plugin_file, 'activate-plugin_' . $plugin_file) . '" title="' . esc_attr__('Activate this plugin') . '" target="_parent">' . __('Activate Plugin') . '</a>',
 							);
 
+		if ( is_multisite() && current_user_can( 'manage_network_plugins' ) )
+			$install_actions['network_activate'] = '<a href="' . wp_nonce_url('plugins.php?action=activate&amp;networkwide=1&amp;plugin=' . $plugin_file, 'activate-plugin_' . $plugin_file) . '" title="' . __('Activate this plugin for all sites in this network') . '" target="_parent">' . __('Network Activate') . '</a>';
+
 		if ( $this->type == 'web' )
 			$install_actions['plugins_page'] = '<a href="' . admin_url('plugin-install.php') . '" title="' . esc_attr__('Return to Plugin Installer') . '" target="_parent">' . __('Return to Plugin Installer') . '</a>';
 		else
@@ -1390,4 +1393,4 @@
 			$this->package = $uploads['basedir'] . '/' . $this->filename;
 		}
 	}