--- a/ui/cocoa/toolkit.m	Sat Feb 21 20:02:31 2026 +0100
+++ b/ui/cocoa/toolkit.m	Sun Mar 15 12:06:03 2026 +0100
@@ -28,6 +28,9 @@
 
 #import "toolkit.h"
 
+#include <stdlib.h>
+#include <string.h>
+
 #include "../common/document.h"
 #include "../common/properties.h"
 #include "../common/menu.h"
@@ -53,7 +56,7 @@
 
 
 void ui_init(const char *appname, int argc, char **argv) {
-    application_name = appname;
+    application_name = appname ? strdup(appname) : NULL;
     app_argc = argc;
     app_argv = (const char**)argv;