1 files changed, 1 insertions, 1 deletions
diff --git a/src/tree.c b/src/tree.c
index 7398fc26..058b6b61 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -711,7 +711,7 @@ zenity_tree_dialog_response (GtkWidget *widget, int response, gpointer data)
       break;
 
     default:
-      if (response < g_strv_length(zen_data->extra_label))
+      if (zen_data->extra_label && response < g_strv_length(zen_data->extra_label))
         printf("%s\n",zen_data->extra_label[response]);
       zen_data->exit_code = zenity_util_return_exit_code (ZENITY_ESC);
       break;