1 files changed, 6 insertions, 0 deletions
diff --git a/src/tree.c b/src/tree.c
index 46b68c2..0e213d5 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -308,6 +308,12 @@ zenity_tree (ZenityData *data, ZenityTreeData *tree_data)
     return;
   }
 
+  if (tree_data->checkbox && tree_data->radiobox) {
+    g_printerr (_("You should use only one List dialog type.\n")); 
+    data->exit_code = zenity_util_return_exit_code (ZENITY_ERROR);
+    return;
+  }
+
   glade_xml_signal_autoconnect (glade_dialog);
 
   dialog = glade_xml_get_widget (glade_dialog, "zenity_tree_dialog");