Index: uspace/srv/fs/fat/fat_fat.h
===================================================================
--- uspace/srv/fs/fat/fat_fat.h	(revision c4bbca86cdf88c7dc61d013838823a08cde1be3b)
+++ uspace/srv/fs/fat/fat_fat.h	(revision d9637426c5abea61ce3d9deac46768f90573616f)
@@ -104,7 +104,7 @@
 
 #define fat_clusters_get(numc, bs, dh, fc) \
-    fat_cluster_walk((bs), (dh), (fc), NULL, (numc), (uint16_t) -1)
+    fat_cluster_walk((bs), (dh), (fc), NULL, (numc), (uint32_t) -1)
 extern int fat_cluster_walk(struct fat_bs *, devmap_handle_t, fat_cluster_t,
-    fat_cluster_t *, uint16_t *, uint16_t);
+    fat_cluster_t *, uint32_t *, uint32_t);
 
 extern int fat_block_get(block_t **, struct fat_bs *, struct fat_node *,