diff --git a/sys/boot/Makefile b/sys/boot/Makefile
index c1258684030..8d7e2ad97d0 100644
--- a/sys/boot/Makefile
+++ b/sys/boot/Makefile
@@ -4,4 +4,9 @@ SUBDIR+=		ficl
 # Pick the machine-dependant subdir based on the target architecture.
 SUBDIR+=		${MACHINE}
 
+# Build ARC / AlphaBIOS executable on the Alpha
+.if ${MACHINE} == "alpha"
+SUBDIR+=		arc
+.endif
+
 .include <bsd.subdir.mk>