diff --git a/lfs/rtl8812au b/lfs/rtl8812au
index fd3128f42..b7f9b8657 100644
--- a/lfs/rtl8812au
+++ b/lfs/rtl8812au
@@ -87,7 +87,7 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
 			/lib/modules/$$(uname -r)$(KCFG)/build/certs/signing_key.pem \
 			/lib/modules/$$(uname -r)$(KCFG)/build/certs/signing_key.x509 \
 			$$f; \
-		xz $$f; \
+		xz --check=crc32 --lzma2=dict=512KiB $$f; \
 		install -m 644 $$f.xz $(MODPATH); \
 	done