diff --git a/openwrt/include/package.mk b/openwrt/include/package.mk
index 9b863074f9..cf8756ea63 100644
--- a/openwrt/include/package.mk
+++ b/openwrt/include/package.mk
@@ -6,7 +6,7 @@ endif
 
 define Build/DefaultTargets
   ifeq ($(DUMP),)
-    ifneq ($$(shell $(SCRIPT_DIR)/timestamp.pl -p $(PKG_BUILD_DIR) . $(TOPDIR)/package/rules.mk),$(PKG_BUILD_DIR))
+    ifneq ($$(shell $(SCRIPT_DIR)/timestamp.pl -p $(PKG_BUILD_DIR) .),$(PKG_BUILD_DIR))
       ifeq ($(CONFIG_AUTOREBUILD),y)
         $(PKG_BUILD_DIR)/.prepared: package-clean
       endif