Index: uspace/srv/fs/minixfs/mfs_rw.c
===================================================================
--- uspace/srv/fs/minixfs/mfs_rw.c	(revision e03d545524b08bb45e88334bed00ae0f4a5311cc)
+++ uspace/srv/fs/minixfs/mfs_rw.c	(revision 5987f917c7169515a42605edaf6227ecf182ce95)
@@ -213,7 +213,7 @@
 		goto out_free_ind1;
 
-	*b = ind2_zone[ind2_off % ptrs_per_block];
+	*b = ind2_zone[rblock - (ind2_off * ptrs_per_block)];
 	if (write_mode) {
-		ind2_zone[ind2_off % ptrs_per_block] = w_block;
+		ind2_zone[rblock - (ind2_off * ptrs_per_block)] = w_block;
 		write_ind_zone(inst, ind_zone[ind2_off], ind2_zone);
 	}