diff --git a/components/utilities/ulog/ulog.c b/components/utilities/ulog/ulog.c
index 9af5fe5b9d0bb564a8931e161b5b14290aa535fa..8a8d142effebfd256dd40a293eadf6c27e0348fa 100644
--- a/components/utilities/ulog/ulog.c
+++ b/components/utilities/ulog/ulog.c
@@ -684,7 +684,7 @@ void ulog_hexdump(const char *tag, rt_size_t width, rt_uint8_t *buf, rt_size_t s
             log_len = 6 + name_len + 2;
             rt_memset(log_buf, ' ', log_len);
         }
-        fmt_result = rt_snprintf(log_buf + log_len, ULOG_LINE_BUF_SIZE, "%04X-%04X: ", i, i + width);
+        fmt_result = rt_snprintf(log_buf + log_len, ULOG_LINE_BUF_SIZE, "%04X-%04X: ", i, i + width - 1);
         /* calculate log length */
         if ((fmt_result > -1) && (fmt_result <= ULOG_LINE_BUF_SIZE))
         {