Index: uspace/srv/fs/fat/fat_idx.c
===================================================================
--- uspace/srv/fs/fat/fat_idx.c	(revision 062d9000625057300f609429080872d6492b542e)
+++ uspace/srv/fs/fat/fat_idx.c	(revision dcb07513e66a1ecb603d6f380ffee05fa3b4e187)
@@ -156,6 +156,6 @@
 	.key_hash = pos_key_hash,
 	.key_equal = pos_key_equal,
-	.equal = 0,
-	.remove_callback = 0,
+	.equal = NULL,
+	.remove_callback = NULL,
 };
 
@@ -202,5 +202,5 @@
 	.key_hash = idx_key_hash,
 	.key_equal = idx_key_equal,
-	.equal = 0,
+	.equal = NULL,
 	.remove_callback = idx_remove_callback,
 };