diff --git a/gnu/lib/libdialog/dialog.h b/gnu/lib/libdialog/dialog.h
index a3e82fc3c577..28c96f628a1a 100644
--- a/gnu/lib/libdialog/dialog.h
+++ b/gnu/lib/libdialog/dialog.h
@@ -57,6 +57,7 @@ typedef struct _dmenu_item {
   void (*selected)(struct _dmenu_item *self, int is_selected);
   void *data;
   char lbra, mark, rbra;
+  int aux;
 } dialogMenuItem;
 
 #define VERSION "0.4"