--- lbbs/include/log.h	2025/05/04 14:54:55	1.2
+++ lbbs/include/log.h	2025/05/05 14:27:57	1.4
@@ -18,11 +18,13 @@
 #ifndef _LOG_H_
 #define _LOG_H_
 
+#include <stddef.h>
+
 extern int log_begin(char *file_log_std, char *file_log_err);
 
 extern void log_end();
 
-extern int log_head(char *buf);
+extern int log_head(char *buf, size_t len);
 
 extern int log_std(const char *format, ...);