Index: uspace/srv/fs/fat/fat_ops.c
===================================================================
--- uspace/srv/fs/fat/fat_ops.c	(revision 990ab7dbcf1608bf6cfd7c11b4b3bfd1778ea8bd)
+++ uspace/srv/fs/fat/fat_ops.c	(revision d0a1e9b64b5ef6dfd3ac6d90e0c04dbd1b0ee23e)
@@ -91,5 +91,5 @@
 static bool fat_is_file(fs_node_t *node);
 static service_id_t fat_service_get(fs_node_t *node);
-static long fat_size_block(service_id_t);
+static uint32_t fat_size_block(service_id_t);
 
 /*
@@ -844,5 +844,5 @@
 }
 
-long fat_size_block(service_id_t service_id)
+uint32_t fat_size_block(service_id_t service_id)
 {
 	fat_bs_t *bs;