diff --git a/sys/compat/linux/linux_file.c b/sys/compat/linux/linux_file.c
index 565fc562fdf..f341e67b11e 100644
--- a/sys/compat/linux/linux_file.c
+++ b/sys/compat/linux/linux_file.c
@@ -1078,9 +1078,14 @@ int
 linux_umount(struct thread *td, struct linux_umount_args *args)
 {
 	struct unmount_args bsd;
+	int flags;
+
+	flags = 0;
+	if ((args->flags & LINUX_MNT_FORCE) != 0)
+		flags |= MNT_FORCE;
 
 	bsd.path = args->path;
-	bsd.flags = args->flags;	/* XXX correct? */
+	bsd.flags = flags;
 	return (sys_unmount(td, &bsd));
 }
 #endif
diff --git a/sys/compat/linux/linux_file.h b/sys/compat/linux/linux_file.h
index 40384c52a06..574feec3f26 100644
--- a/sys/compat/linux/linux_file.h
+++ b/sys/compat/linux/linux_file.h
@@ -56,6 +56,11 @@
 #define	LINUX_MS_NOEXEC		0x0008
 #define	LINUX_MS_REMOUNT	0x0020
 
+/*
+ * umount2 flags
+ */
+#define	LINUX_MNT_FORCE		0x0001
+
 /*
  * common open/fcntl flags
  */