--- a/src/Makefile	Sun Feb 18 13:16:38 2024 +0100
+++ b/src/Makefile	Sun Feb 18 13:38:42 2024 +0100
@@ -124,7 +124,8 @@
 	@echo "Compiling $<"
 	$(CC) -o $@ $(CFLAGS) -c $<
 
-$(build_dir)/tree$(OBJ_EXT): tree.c cx/tree.h cx/common.h
+$(build_dir)/tree$(OBJ_EXT): tree.c cx/tree.h cx/common.h cx/iterator.h \
+ cx/array_list.h cx/list.h cx/collection.h cx/allocator.h
 	@echo "Compiling $<"
 	$(CC) -o $@ $(CFLAGS) -c $<