diff --git a/debian/rules b/debian/rules
index 47d964d..8931889 100755
--- a/debian/rules
+++ b/debian/rules
@@ -90,4 +90,4 @@ override_dh_auto_install:
 
 generate-gnu-efi:
 	git -C gnu-efi archive --prefix=gnu-efi/ HEAD | xz -9 \
-		> ../shim_$(plain_upstream_version).orig-gnu-efitar.xz
+		> ../shim_$(plain_upstream_version).orig-gnu-efi.tar.xz