diff --git a/usr.sbin/bootparamd/callbootd/Makefile b/usr.sbin/bootparamd/callbootd/Makefile
index 3c0d3143cc23..5a08d608a4c8 100644
--- a/usr.sbin/bootparamd/callbootd/Makefile
+++ b/usr.sbin/bootparamd/callbootd/Makefile
@@ -13,12 +13,12 @@ CLEANFILES= ${GENSRCS}
 RPCSRC=	${DESTDIR}/usr/include/rpcsvc/bootparam_prot.x
 
 bootparam_prot_clnt.c: ${RPCSRC}
-	rpcgen -l -o ${.TARGET} ${RPCSRC}
+	rpcgen -C -l -o ${.TARGET} ${RPCSRC}
 
 bootparam_prot_xdr.c: ${RPCSRC}
-	rpcgen -c -o ${.TARGET} ${RPCSRC}
+	rpcgen -C -c -o ${.TARGET} ${RPCSRC}
 
 bootparam_prot.h: ${RPCSRC}
-	rpcgen -h -o ${.TARGET} ${RPCSRC}
+	rpcgen -C -h -o ${.TARGET} ${RPCSRC}
 
 .include <bsd.prog.mk>