--- lbbs/src/article_del.c	2025/06/15 04:45:13	1.1
+++ lbbs/src/article_del.c	2025/06/15 04:47:59	1.2
@@ -20,6 +20,7 @@
 #include "io.h"
 #include "screen.h"
 #include "user_priv.h"
+#include <ctype.h>
 #include <stdlib.h>
 
 int article_del(const SECTION_LIST *p_section, const ARTICLE *p_article)