Index: lib/lib9p/Makefile
===================================================================
--- lib/lib9p/Makefile
+++ lib/lib9p/Makefile
@@ -8,20 +8,20 @@
 LIB=		9p
 PACKAGE=	lib${LIB}
 SHLIB_MAJOR=	1
-SRCS=		pack.c \
-		connection.c \
-		request.c \
+SRCS=		connection.c \
 		genacl.c \
-		log.c \
 		hashtable.c \
+		log.c \
+		pack.c \
+		request.c \
 		rfuncs.c \
-		utils.c \
 		threadpool.c \
-		transport/socket.c \
-		backend/fs.c
+		utils.c \
+		backend/fs.c \
+		transport/socket.c
 
 INCSDIR=	${INCLUDEDIR}/lib9p
-INCS=		lib9p.h fid.h backend/fs.h
+INCS=		fid.h lib9p.h backend/fs.h
 
 LIBADD=		sbuf
 
Index: usr.sbin/bhyve/pci_virtio_9p.c
===================================================================
--- usr.sbin/bhyve/pci_virtio_9p.c
+++ usr.sbin/bhyve/pci_virtio_9p.c
@@ -259,7 +259,11 @@
 		if (strcmp(opt, "ro") == 0) {
 			DPRINTF(("read-only mount requested\r\n"));
 			ro = true;
+			continue;
 		}
+
+		printf("virtio-9p: invalid option '%s'\n", opt);
+		return (1);
 	}
 
 	if (strlen(sharename) > VT9P_MAXTAGSZ) {