diff --git a/build/lemonldap-ng/Makefile b/build/lemonldap-ng/Makefile
index 60c1255fc..453095e49 100644
--- a/build/lemonldap-ng/Makefile
+++ b/build/lemonldap-ng/Makefile
@@ -560,3 +560,27 @@ debian-diff:
 		$(DIFF) -x 'jquery*' lemonldap-ng-manager/example/skins/$$i /usr/share/lemonldap-ng/manager-skins/$$i; \
 	done ||true
 
+default-diff:
+	@# Portal
+	@$(DIFF) lemonldap-ng-portal/lib/Lemonldap/NG/Portal /usr/local/share/perl/5.10.0/Lemonldap/NG/Portal ||true
+	@$(DIFF) lemonldap-ng-portal/example/scripts/purgeCentralCache $(LMPREFIX)/bin/purgeCentralCache ||true
+	@$(DIFF) lemonldap-ng-portal/example/scripts/buildPortalWSDL $(LMPREFIX)/bin/buildPortalWSDL ||true
+	@$(DIFF) lemonldap-ng-portal/example/skins $(LMPREFIX)/htdocs/portal/skins ||true
+	@$(DIFF) -I '$skin_dir' -I '$appsxmlfile' lemonldap-ng-portal/example/index.pl $(LMPREFIX)/htdocs/portal/index.pl ||true
+	@$(DIFF) lemonldap-ng-portal/example/error.pl $(LMPREFIX)/htdocs/portal/error.pl ||true
+	@# Handler
+	@$(DIFF) lemonldap-ng-handler/lib/Lemonldap/NG/Handler /usr/local/share/perl/5.10.0/Lemonldap/NG/Handler ||true
+	@$(DIFF) lemonldap-ng-handler/example/MyHandler.pm $(LMPREFIX)/handler/MyHandler.pm ||true
+	@# Common
+	@$(DIFF) lemonldap-ng-common/lib/Lemonldap/NG/Common /usr/local/share/perl/5.10.0/Lemonldap/NG/Common ||true
+	@$(DIFF) lemonldap-ng-common/lib/Lemonldap/NG/Common.pm /usr/local/share/perl/5.10.0/Lemonldap/NG/Common.pm ||true
+	@$(DIFF) lemonldap-ng-common/scripts/lmMigrateConfFiles2ini $(LMPREFIX)/bin/lmMigrateConfFiles2ini ||true
+	@$(DIFF) lemonldap-ng-common/scripts/convertConfig $(LMPREFIX)/bin/convertConfig ||true
+	@# Manager
+	@$(DIFF) lemonldap-ng-manager/lib/Lemonldap/NG/Manager /usr/local/share/perl/5.10.0/Lemonldap/NG/Manager ||true
+	@$(DIFF) lemonldap-ng-manager/lib/Lemonldap/NG/Manager.pm /usr/local/share/perl/5.10.0/Lemonldap/NG/Manager.pm ||true
+	@$(DIFF) lemonldap-ng-manager/example/images $(LMPREFIX)/htdocs/manager/images ||true
+	@$(DIFF) lemonldap-ng-manager/example/skins $(LMPREFIX)/htdocs/manager/skins ||true
+	@$(DIFF) -I '$main_dir' lemonldap-ng-manager/example/index.pl $(LMPREFIX)/htdocs/manager/index.pl ||true
+	@$(DIFF) lemonldap-ng-manager/example/sessions.pl $(LMPREFIX)/htdocs/manager/sessions.pl ||true
+