diff --git a/sys/conf/files b/sys/conf/files
index d2cb2ee5ee16..8b30d17f28b5 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -3461,7 +3461,7 @@ ofed/drivers/infiniband/core/mad.c		optional ofed		\
 	compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/core/"
 ofed/drivers/infiniband/core/cm.c		optional ofed		\
 	no-depend							\
-	compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/core/"
+	compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/core/ -Wno-unused-function"
 ofed/drivers/infiniband/core/cma.c		optional ofed		\
 	no-depend							\
 	compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/core/"
diff --git a/sys/modules/ibcore/Makefile b/sys/modules/ibcore/Makefile
index d913f79ff132..d7973c868908 100644
--- a/sys/modules/ibcore/Makefile
+++ b/sys/modules/ibcore/Makefile
@@ -21,3 +21,6 @@ CFLAGS+= -DINET6 -DINET -DOFED
 .include <bsd.kmod.mk>
 
 CFLAGS+= -Wno-cast-qual -Wno-pointer-arith ${GCC_MS_EXTENSIONS}
+
+CWARNFLAGS.cm.c=	-Wno-unused-function
+CWARNFLAGS+=		${CWARNFLAGS.${.IMPSRC:T}}