diff --git a/wp-admin/admin.php b/wp-admin/admin.php
index a759d452b..d051a3efc 100644
--- a/wp-admin/admin.php
+++ b/wp-admin/admin.php
@@ -152,7 +152,7 @@ if ( isset($plugin_page) ) {
 		if ( file_exists(WPMU_PLUGIN_DIR . "/$plugin_page") )
 			include(WPMU_PLUGIN_DIR . "/$plugin_page");
 		else
-			include(ABSPATH . PLUGINDIR . "/$plugin_page");
+			include(WP_PLUGIN_DIR . "/$plugin_page");
 	}
 
 	include(ABSPATH . 'wp-admin/admin-footer.php');