diff --git a/bridge/mst.c b/bridge/mst.c
index 32f64aba..37362c45 100644
--- a/bridge/mst.c
+++ b/bridge/mst.c
@@ -153,6 +153,7 @@ static int mst_show(int argc, char **argv)
 
 	if (rtnl_dump_filter(&rth, print_msts, stdout) < 0) {
 		fprintf(stderr, "Dump terminated\n");
+		delete_json_obj();
 		return -1;
 	}