diff --git a/ratemon/runtime/c/Makefile b/ratemon/runtime/c/Makefile
index ced799f..0721ec5 100644
--- a/ratemon/runtime/c/Makefile
+++ b/ratemon/runtime/c/Makefile
@@ -78,10 +78,12 @@ clean:
 	for id in `sudo bpftool struct_ops list | cut -d":" -f1`; do sudo bpftool struct_ops unregister id $$id; done
 	sudo tc filter del dev $(RM_IFACE) egress || true
 	sudo tc qdisc del dev $(RM_IFACE) clsact || true
-	sudo rm -f /sys/fs/bpf/flow_to_rwnd
-	sudo rm -f /sys/fs/bpf/flow_to_win_scale
-	sudo rm -f /sys/fs/bpf/tc/globals/flow_to_rwnd
-	sudo rm -f /sys/fs/bpf/tc/globals/flow_to_win_scale
+	sudo rm -fv /sys/fs/bpf/flow_to_rwnd
+	sudo rm -fv /sys/fs/bpf/flow_to_win_scale
+	sudo rm -fv /sys/fs/bpf/flow_to_last_data_time_ns
+	sudo rm -fv /sys/fs/bpf/tc/globals/flow_to_rwnd
+	sudo rm -fv /sys/fs/bpf/tc/globals/flow_to_win_scale
+	sudo rm -fv /sys/fs/bpf/tc/globals/flow_to_last_data_time_ns
 
 $(OUTPUT) $(OUTPUT)/libbpf $(BPFTOOL_OUTPUT):
 	$(call msg,MKDIR,$@)