diff --git a/lib/Makefile b/lib/Makefile
index f49445d..26f578b 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -141,6 +141,10 @@
 lib-$(CONFIG_LIBFDT) += $(libfdt_files)
 
 obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o
+obj-$(CONFIG_PRIO_TREE_TEST) += prio_tree_test.o
+obj-$(CONFIG_INTERVAL_TREE_TEST) += interval_tree_test.o
+
+interval_tree_test-objs := interval_tree_test_main.o interval_tree.o
 
 hostprogs-y	:= gen_crc32table
 clean-files	:= crc32table.h