diff --git a/cmds-inspect-dump-tree.c b/cmds-inspect-dump-tree.c
index 93dff086..876ddcb5 100644
--- a/cmds-inspect-dump-tree.c
+++ b/cmds-inspect-dump-tree.c
@@ -222,6 +222,7 @@ int cmd_inspect_dump_tree(int argc, char **argv)
 	int uuid_tree_only = 0;
 	int roots_only = 0;
 	int root_backups = 0;
+	unsigned open_ctree_flags = OPEN_CTREE_FS_PARTIAL;
 	u64 block_only = 0;
 	struct btrfs_root *tree_root_scan;
 	u64 tree_id = 0;
@@ -260,6 +261,11 @@ int cmd_inspect_dump_tree(int argc, char **argv)
 			root_backups = 1;
 			break;
 		case 'b':
+			/*
+			 * If only showing one block, no need to fill roots
+			 * other than chunk root
+			 */
+			open_ctree_flags |= __OPEN_CTREE_RETURN_CHUNK_ROOT;
 			block_only = arg_strtou64(optarg);
 			break;
 		case 't': {
@@ -299,19 +305,14 @@ int cmd_inspect_dump_tree(int argc, char **argv)
 
 	printf("%s\n", PACKAGE_STRING);
 
-	info = open_ctree_fs_info(argv[optind], 0, 0, 0, OPEN_CTREE_PARTIAL);
+	info = open_ctree_fs_info(argv[optind], 0, 0, 0, open_ctree_flags);
 	if (!info) {
 		error("unable to open %s", argv[optind]);
 		goto out;
 	}
 
-	root = info->fs_root;
-	if (!root) {
-		error("unable to open %s", argv[optind]);
-		goto out;
-	}
-
 	if (block_only) {
+		root = info->chunk_root;
 		leaf = read_tree_block(info,
 				      block_only,
 				      info->nodesize, 0);
@@ -337,6 +338,12 @@ int cmd_inspect_dump_tree(int argc, char **argv)
 		goto close_root;
 	}
 
+	root = info->fs_root;
+	if (!root) {
+		error("unable to open %s", argv[optind]);
+		goto out;
+	}
+
 	if (!(extent_only || uuid_tree_only || tree_id)) {
 		if (roots_only) {
 			printf("root tree: %llu level %d\n",