diff --git a/debian/rules b/debian/rules
index 080f576363..721c77f32e 100755
--- a/debian/rules
+++ b/debian/rules
@@ -34,7 +34,7 @@ override_dh_auto_build:
 	dh_auto_build
 	# some architectures may not support all hardening options but at least
 	# log the build's hardening results
-	-$(MAKE) hardening-check
+	-$(MAKE) -C $(CURDIR)/obj-* hardening-check
 	# fix links in documentation
 	sed -i "s|$(CURDIR)/docbook|..|" obj-*/docbook/ws*g_html_chunked/*.html