Index: uspace/srv/fs/fat/fat_ops.c
===================================================================
--- uspace/srv/fs/fat/fat_ops.c	(revision d290ef43dea2d197f32f3790ad40c206000935c4)
+++ uspace/srv/fs/fat/fat_ops.c	(revision 64cbf94a6b7caf806b66d0b3b7f8dd7b9732f87e)
@@ -462,4 +462,6 @@
 	fat_zero_cluster(bs, parentp->idx->dev_handle, mcl);
 	fat_append_clusters(bs, parentp, mcl);
+	parentp->size += bps * bs->spc;
+	parentp->dirty = true;		/* need to sync node */
 	b = fat_block_get(bs, parentp, i, BLOCK_FLAGS_NONE);
 	d = (fat_dentry_t *)b->data;