--- a/ui/gtk/toolkit.c	Sat Feb 21 20:02:31 2026 +0100
+++ b/ui/gtk/toolkit.c	Sun Mar 15 12:06:03 2026 +0100
@@ -63,7 +63,7 @@
 static UiBool        exit_on_shutdown;
 
 UIEXPORT void ui_init(const char *appname, int argc, char **argv) {
-    application_name = appname;
+    application_name = appname ? strdup(appname) : NULL;
     uic_init_global_context();
     
 #if GTK_MAJOR_VERSION >= 4