diff --git a/libbtrfs.sym b/libbtrfs.sym
index f7b5d87b..047a6eb1 100644
--- a/libbtrfs.sym
+++ b/libbtrfs.sym
@@ -1,57 +1,57 @@
 LIBBTRFS_0.1 {
 global:
 	/* ctree.h */
-	btrfs_lookup_uuid_received_subvol_item;
-	btrfs_lookup_uuid_subvol_item;
+	/* btrfs_lookup_uuid_received_subvol_item; */
+	/* btrfs_lookup_uuid_subvol_item; */
 
 	/* btrfs-list.h -- not distributed anymore */
-	btrfs_get_subvol;
-	btrfs_list_get_path_rootid;
+	/* btrfs_get_subvol; */
+	/* btrfs_list_get_path_rootid; */
 
 	/* radix-tree.h */
-	radix_tree_delete;
-	radix_tree_gang_lookup;
-	radix_tree_gang_lookup_tag;
-	radix_tree_init;
-	radix_tree_insert;
-	radix_tree_lookup;
-	radix_tree_lookup_slot;
-	radix_tree_preload;
-	radix_tree_tag_clear;
-	radix_tree_tagged;
-	radix_tree_tag_get;
-	radix_tree_tag_set;
+	/* radix_tree_delete; */
+	/* radix_tree_gang_lookup; */
+	/* radix_tree_gang_lookup_tag; */
+	/* radix_tree_init; */
+	/* radix_tree_insert; */
+	/* radix_tree_lookup; */
+	/* radix_tree_lookup_slot; */
+	/* radix_tree_preload; */
+	/* radix_tree_tag_clear; */
+	/* radix_tree_tagged; */
+	/* radix_tree_tag_get; */
+	/* radix_tree_tag_set; */
 
 	/* raid56.h -- not distributed anymore */
-	raid56_recov;
-	raid5_gen_result;
-	raid6_gen_syndrome;
-	raid6_recov_data2;
-	raid6_recov_datap;
+	/* raid56_recov; */
+	/* raid5_gen_result; */
+	/* raid6_gen_syndrome; */
+	/* raid6_recov_data2; */
+	/* raid6_recov_datap; */
 
 	/* rbtree.h */
-	rb_erase;
-	rb_first;
-	rb_first_postorder;
-	rb_insert_color;
-	rb_last;
-	rb_next;
-	rb_next_postorder;
-	rb_prev;
-	rb_replace_node;
+	/* rb_erase; */
+	/* rb_first; */
+	/* rb_first_postorder; */
+	/* rb_insert_color; */
+	/* rb_last; */
+	/* rb_next; */
+	/* rb_next_postorder; */
+	/* rb_prev; */
+	/* rb_replace_node; */
 
 	/* common/send-stream.h */
-	btrfs_read_and_process_send_stream;
+	btrfs_read_and_process_send_stream;	/* used */
 
 	/* common/send-utils.h */
-	subvol_uuid_search;
-	subvol_uuid_search2;
-	subvol_uuid_search_add;
-	subvol_uuid_search_finit;
-	subvol_uuid_search_init;
-	btrfs_subvolid_resolve;
-	path_cat_out;
-	path_cat3_out;
+	subvol_uuid_search;			/* used */
+	/* subvol_uuid_search2; */
+	/* subvol_uuid_search_add; */
+	/* subvol_uuid_search_finit; */
+	subvol_uuid_search_init;		/* used */
+	btrfs_subvolid_resolve;			/* used */
+	/* path_cat_out; */
+	/* path_cat3_out; */
 local:
 	*;
 };