diff --git a/doc/config.but b/doc/config.but
index 96f73396..1990a92a 100644
--- a/doc/config.but
+++ b/doc/config.but
@@ -214,7 +214,8 @@ digits.
 \b \c{&T} will be replaced by the current time, as six digits
 (HHMMSS) with no punctuation.
 
-\b \c{&H} will be replaced by the host name you are connecting to.
+\b \c{&H} will be replaced by the host name you are connecting to
+(or the serial line, for a serial connection).
 
 \b \c{&P} will be replaced by the port number you are connecting to on
 the target host.
diff --git a/logging.c b/logging.c
index ff687cb7..031aae4a 100644
--- a/logging.c
+++ b/logging.c
@@ -174,7 +174,7 @@ void logfopen(LogContext *ctx)
         filename_free(ctx->currlogfilename);
     ctx->currlogfilename =
         xlatlognam(conf_get_filename(ctx->conf, CONF_logfilename),
-                   conf_get_str(ctx->conf, CONF_host),
+                   conf_dest(ctx->conf),    /* hostname or serial line */
                    conf_get_int(ctx->conf, CONF_port), &tm);
 
     if (open_for_write_would_lose_data(ctx->currlogfilename)) {