Index: uspace/srv/fs/minixfs/mfs_inode.c
===================================================================
--- uspace/srv/fs/minixfs/mfs_inode.c	(revision 7bd68e64bde4cfee7fed3c9942a2d81050fda6b7)
+++ uspace/srv/fs/minixfs/mfs_inode.c	(revision 82c198fe4cfb91a9b31fc2b1c25c7f102f07927e)
@@ -310,4 +310,7 @@
 		if (r != EOK)
 			return r;
+
+		ino_i->i_size += bs;
+		ino_i->dirty = true;
 	}
 	return EOK;