diff --git a/utils/osmo-config-merge.c b/utils/osmo-config-merge.c
index 3762c67..c76e42d 100644
--- a/utils/osmo-config-merge.c
+++ b/utils/osmo-config-merge.c
@@ -265,4 +265,6 @@
 	/* make AddressSanitizer / LeakSanitizer happy by recursively freeing the trees */
 	talloc_free(patch_tree);
 	talloc_free(base_tree);
+
+	return 0;
 }