--- a/util-src/GNUmakefile	Fri Jul 10 13:01:17 2020 +0100
+++ b/util-src/GNUmakefile	Sun Jul 12 23:28:04 2020 +0200
@@ -24,6 +24,7 @@
 clean:
 	rm -f $(ALL) $(patsubst %.so,%.o,$(ALL))
 
+encodings.o: CFLAGS+=$(IDNA_FLAGS)
 encodings.so: LDLIBS+=$(IDNA_LIBS)
 
 hashes.so: LDLIBS+=$(OPENSSL_LIBS)