diff --git a/cmd/Makefile b/cmd/Makefile
index 9ea56e9..b92e42d 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -192,3 +192,5 @@ $(obj)/license_data_gz.h: $(obj)/license_data.gz FORCE
 targets += license_data_size.h
 $(obj)/license_data_size.h: $(srctree)/Licenses/gpl-2.0.txt FORCE
 	$(call filechk,data_size)
+
+CFLAGS_ethsw.o := -Wno-enum-conversion