diff --git a/make/rules.mk b/make/rules.mk
index 67994488..e5bc2377 100644
--- a/make/rules.mk
+++ b/make/rules.mk
@@ -150,6 +150,8 @@ echo-modules:
 echo-include:
 	@echo "INCLUDE          : $(INCLUDE)"
 
+echo-contrib:
+
 trace-marks:
 	for f in $(ALL_CPP); do \
 		sed 's/^{$$/{_/' $$f > $$f.rep ;\