diff --git a/02-Test_set_after_reference/Makefile b/02-Test_set_after_reference/Makefile
new file mode 100644
index 0000000..e418000
--- /dev/null
+++ b/02-Test_set_after_reference/Makefile
@@ -0,0 +1,10 @@
+
+PUBLIC_INCVPATH += $(PROJECT_ROOT)/public
+$(warning "PUBLIC_INCVPATH : $(PUBLIC_INCVPATH), with PROJECT_ROOT not set")
+
+PROJECT_ROOT:=$(CURDIR)
+
+$(warning "PUBLIC_INCVPATH : $(PUBLIC_INCVPATH), with PROJECT_ROOT set")
+
+all:
+	@echo "This is a dummy target to ensure the Makefile is valid."