--- a/src/SelectionBuilder.C	2022-04-27 15:21:15.000000000 +0900
+++ b/src/SelectionBuilder.C	2025-03-20 15:02:33.086330280 +0900
@@ -182,7 +182,7 @@
 
   int line = self->macrobrowser->value();
   if (!line) {
-    self->macrooutput->value(NULL);
+    self->macrooutput->value("");
     return;
   }
   const char *name = self->macrobrowser->text(line);