diff --git a/Makefile.in b/Makefile.in
index d0fbe589..9862e63f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -821,7 +821,8 @@ $(FONTS_OBJ)/source-han/%.ttf: $$(%.ttf_CIDFONT) $$(%.ttf_FEATURES) $$(%.ttf_SEQ
 	# to run it in a dedicated temporary directory to prevent concurrent instances
 	# to step onto each other's feet
 	(TEMP_DIR=`mktemp -d` && cd $$TEMP_DIR && afdko sfntedit -a CFF=$(abspath $($(notdir $@)).cff) $(abspath $@.tmp) && rm -fr $$TEMP_DIR)
-	mv $@.tmp $@
+	afdko otf2ttf -o $@ $@.tmp
+	rm $@.tmp
 
 $(FONTS_OBJ)/ume-gothic/%.ttf: $$(%.ttf_FONT) $$(%.ttf_NAMETABLE_PATCH)
 	mkdir -p $(FONTS_OBJ)/ume-gothic