diff --git a/funcs.mk b/funcs.mk
index fea7d45..62fd82f 100644
--- a/funcs.mk
+++ b/funcs.mk
@@ -64,7 +64,7 @@ get-$(1): $(1).cddl
 $(1).cddl:
 	@{ \
 	$$(curl) -LO $$(join $(2), $$(join $(3), $$(join $(4)/, $$@))); \
-	sed -i.bak 's/^@\.start\.@//' $$@; \
+	sed -i.bak '/^@\.start\.@/d' $$@; \
 	}
 
 .PHONY: get-$(1)