diff --git a/usr.bin/ofed/opensm/Makefile b/usr.bin/ofed/opensm/Makefile
index 2c1f504dc191..738b6ace31a1 100644
--- a/usr.bin/ofed/opensm/Makefile
+++ b/usr.bin/ofed/opensm/Makefile
@@ -1,102 +1,104 @@
 # $FreeBSD$
 
 _spath=	${SRCTOP}/contrib/ofed/opensm/opensm
 .PATH: ${_spath} ${_spath:H}/man
 
 BINDIR?=	/usr/bin
 PROG=		opensm
 
 SRCS= \
 main.c \
 osm_congestion_control.c \
 osm_console.c \
 osm_console_io.c \
 osm_db_files.c \
 osm_db_pack.c \
 osm_drop_mgr.c \
 osm_dump.c \
 osm_event_plugin.c \
 osm_guid_info_rcv.c \
 osm_guid_mgr.c \
 osm_inform.c \
 osm_lid_mgr.c \
 osm_lin_fwd_rcv.c \
 osm_link_mgr.c \
 osm_mcast_fwd_rcv.c \
 osm_mcast_mgr.c \
 osm_mcast_tbl.c \
 osm_mcm_port.c \
 osm_mesh.c \
 osm_mlnx_ext_port_info_rcv.c \
 osm_mtree.c \
 osm_multicast.c \
 osm_node.c \
 osm_node_desc_rcv.c \
 osm_node_info_rcv.c \
 osm_opensm.c \
 osm_perfmgr.c \
 osm_perfmgr_db.c \
 osm_pkey.c \
 osm_pkey_mgr.c \
 osm_pkey_rcv.c \
 osm_port.c \
 osm_port_info_rcv.c \
 osm_prtn.c \
 osm_prtn_config.c \
 osm_qos.c \
 osm_qos_parser_l.l \
 osm_qos_parser_y.y \
 osm_qos_policy.c \
 osm_remote_sm.c \
 osm_req.c \
 osm_resp.c \
 osm_router.c \
 osm_sa.c \
 osm_sa_class_port_info.c \
 osm_sa_guidinfo_record.c \
 osm_sa_informinfo.c \
 osm_sa_lft_record.c \
 osm_sa_link_record.c \
 osm_sa_mad_ctrl.c \
 osm_sa_mcmember_record.c \
 osm_sa_mft_record.c \
 osm_sa_multipath_record.c \
 osm_sa_node_record.c \
 osm_sa_path_record.c \
 osm_sa_pkey_record.c \
 osm_sa_portinfo_record.c \
 osm_sa_service_record.c \
 osm_sa_slvl_record.c \
 osm_sa_sminfo_record.c \
 osm_sa_sw_info_record.c \
 osm_sa_vlarb_record.c \
 osm_service.c \
 osm_slvl_map_rcv.c \
 osm_sm.c \
 osm_sm_mad_ctrl.c \
 osm_sm_state_mgr.c \
 osm_sminfo_rcv.c \
 osm_state_mgr.c \
 osm_subnet.c \
 osm_sw_info_rcv.c \
 osm_switch.c \
 osm_torus.c \
 osm_trap_rcv.c \
 osm_ucast_cache.c \
 osm_ucast_dfsssp.c \
 osm_ucast_dnup.c \
 osm_ucast_file.c \
 osm_ucast_ftree.c \
 osm_ucast_lash.c \
 osm_ucast_mgr.c \
 osm_ucast_updn.c \
 osm_vl15intf.c \
 osm_vl_arb_rcv.c \
 st.c
 
 MAN=		opensm.8
 CFLAGS+=	-I${_spath:H} -DHAVE_CONFIG_H=1
 CFLAGS+=	-I${SYSROOT:U${DESTDIR}}/${INCLUDEDIR}/infiniband
 LIBADD=		opensm osmvendor osmcomp wrap pthread
 
+WARNS?=		2
+
 .include <bsd.prog.mk>