--- Makefile.orig	2019-02-06 03:02:43.000000000 -0500
+++ Makefile	2019-02-24 14:58:26.785517000 -0500
@@ -59,7 +59,7 @@
 .endif
 
 # keep in sync with all platforms where libunwind is available
-.if (${ARCH} == amd64 || ${ARCH} == i386)
+.if (${ARCH} == amd64 || ${ARCH} == i386 || ${ARCH} == aarch64)
 LIB_DEPENDS+=	libunwind.so:devel/libunwind
 .endif