diff --git a/debian/rules.real b/debian/rules.real
index a96579f07..84a0567cd 100644
--- a/debian/rules.real
+++ b/debian/rules.real
@@ -159,7 +159,7 @@ install-dummy:
 	dh_testdir
 	dh_testroot
 	dh_prep
-	$(MAKE_SELF) install-base
+	+$(MAKE_SELF) install-base
 
 install-doc: PACKAGE_NAME = linux-doc-$(VERSION)
 install-doc: DIR = $(BUILD_DIR)/build-doc