diff --git a/java/jna/Makefile b/java/jna/Makefile
index 363d17c7bc9..0e40b5cb1c0 100644
--- a/java/jna/Makefile
+++ b/java/jna/Makefile
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.29 2021/05/19 01:50:30 kurt Exp $
+# $OpenBSD: Makefile,v 1.30 2021/05/21 16:03:42 kurt Exp $
 
 COMMENT=	Java Native Access (JNA)
 
@@ -33,7 +33,7 @@ TEST_DEPENDS=	${BASE_PKGPATH} \
 MAKE_ENV=	CC="${CC}" \
 		PORTS_CFLAGS="${CFLAGS}"
 
-GNU_ARCH=	${ARCH:S/amd64/x86-64/:S/i386/x86/}
+GNU_ARCH=	${MACHINE_ARCH:S/amd64/x86-64/:S/i386/x86/}
 
 # XXX: remove stale distribution file
 post-extract: