--- lbbs/src/user_info_display.c	2025/10/23 11:58:00	1.5
+++ lbbs/src/user_info_display.c	2025/10/23 12:00:02	1.6
@@ -22,6 +22,7 @@
 #include "user_list.h"
 #include "user_info_display.h"
 #include "user_priv.h"
+#include <ctype.h>
 #include <string.h>
 #include <time.h>
 #include <sys/param.h>