diff --git a/core/binary.mk b/core/binary.mk
index bee4428..f2ae0f5 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -472,6 +472,8 @@
 	$(transform-proto-to-cc)
 
 $(proto_generated_headers): $(proto_generated_cc_sources_dir)/%.pb.h: $(proto_generated_cc_sources_dir)/%.pb.cc
+	# This is just a dummy rule to make sure gmake doesn't skip updating the dependents.
+	@echo "Updated header file $<."
 
 $(my_prefix)_$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_proto_defined := true
 endif  # transform-proto-to-cc rule included only once