diff --git a/src/backend/cocoa/nvdialog_about_dialog.m b/src/backend/cocoa/nvdialog_about_dialog.m
index 9f88f70..b780910 100644
--- a/src/backend/cocoa/nvdialog_about_dialog.m
+++ b/src/backend/cocoa/nvdialog_about_dialog.m
@@ -39,7 +39,9 @@
 void nvd_about_dialog_set_licence_link_cocoa(NvdAboutDialog *dialog, const char *license_link, const char *txt)
 {
     (void)txt;
-    dialog->raw[NSAboutPanelOptionCredits] = @(license_link);
+    NSMutableDictionary<NSAboutPanelOptionKey, id> *raw = dialog->raw;
+    raw[NSAboutPanelOptionCredits] = @(license_link);
+    dialog->raw = raw;
 }
 
 void *nvd_about_dialog_get_raw_cocoa(NvdAboutDialog *dlg)