diff --git a/make/rules.mk b/make/rules.mk
index a343b522..780d780b 100644
--- a/make/rules.mk
+++ b/make/rules.mk
@@ -174,6 +174,12 @@ trace-marks:
 		cp $$f.rep $$f ;\
 	done
 
+remove-trace-marks:
+	for f in $(ALL_CPP); do \
+		$(SED) 's/^{_$$/{/' $$f > $$f.rep ;\
+		cp $$f.rep $$f ;\
+	done
+
 core-pattern:
 	echo core.%e.%p | sudo tee /proc/sys/kernel/core_pattern
 ifneq ($(TARGET),mingw)