diff --git a/Makefile b/Makefile
index aa63913..b20b954 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@ SUBDIRS := encap-forward
 SUBDIRS += ktrace-CO-RE
 SUBDIRS += lsm-nobpf
 SUBDIRS += nat64-bpf
+SUBDIRS += preserve-dscp
 SUBDIRS += traffic-pacing-edt
 
 .PHONY: check_submodule help clobber distclean clean $(SUBDIRS)
diff --git a/preserve-dscp/preserve-dscp.c b/preserve-dscp/preserve-dscp.c
index 9192d12..8c66186 100644
--- a/preserve-dscp/preserve-dscp.c
+++ b/preserve-dscp/preserve-dscp.c
@@ -84,7 +84,7 @@ int main(int argc, char *argv[])
 		return err;
 	}
 
-	while ((map = bpf_map__next(map, obj))) {
+	while ((map = bpf_object__next_map(obj, map))) {
 		if (strstr(bpf_map__name(map), ".rodata")) {
 			int ip_only = (iftype == ARPHRD_NONE);
 			bpf_map__set_initial_value(map, &ip_only, sizeof(ip_only));