diff --git a/plugins/huawei/mm-plugin-huawei.c b/plugins/huawei/mm-plugin-huawei.c
index 07652ec7..31ee6274 100644
--- a/plugins/huawei/mm-plugin-huawei.c
+++ b/plugins/huawei/mm-plugin-huawei.c
@@ -458,6 +458,8 @@ propagate_getportmode_hints (MMPlugin *self,
         mode_i++;
     }
 
+    g_list_free (tty_probes);
+
     return n_ports_with_hints;
 }