diff --git a/debian/rules.real b/debian/rules.real
index 2d531219c..296459cdd 100644
--- a/debian/rules.real
+++ b/debian/rules.real
@@ -523,7 +523,7 @@ install-source: $(BUILD_DIR)/$(SOURCE_PACKAGE_NAME)-source-$(UPSTREAMVERSION).ta
 	dh_testdir
 	dh_testroot
 	dh_installdirs /usr/src/linux-config-$(UPSTREAMVERSION)
-	dh_install '$^' /usr/src
+	dh_install $^ /usr/src
 # Include our kernel config files, but with the module signing
 # configuration fixed to work for custom kernels.
 	for triplet in $(ALL_TRIPLETS); do \