diff --git a/core/binary.mk b/core/binary.mk
index bbdf4d2..f4a7eae 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -411,6 +411,8 @@
 
 proto_generated_headers := $(patsubst %.pb.cc,%.pb.h, $(proto_generated_cc_sources))
 $(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 $<."
 
 $(proto_generated_objects): PRIVATE_ARM_MODE := $(normal_objects_mode)
 $(proto_generated_objects): PRIVATE_ARM_CFLAGS := $(normal_objects_cflags)