1 files changed, 2 insertions, 2 deletions
diff --git a/mh.c b/mh.c
index ce724f3e..3ea7f158 100644
--- a/mh.c
+++ b/mh.c
@@ -324,7 +324,7 @@ int mh_valid_message (const char *s)
 {
   for (; *s; s++)
   {
-    if (!isdigit (*s))
+    if (!isdigit ((unsigned char) *s))
       return 0;
   }
   return 1;
@@ -452,7 +452,7 @@ void maildir_create_filename (const char *path, HEADER *hdr, char *msg, char *fu
   FOREVER
   {
     snprintf (msg, _POSIX_PATH_MAX, "%s/%ld.%d_%d.%s%s",
-	      subdir, time (NULL), getpid (), Counter++, Hostname, suffix);
+	      subdir, time (NULL), getpid (), Counter++, NONULL(Hostname), suffix);
     snprintf (full, _POSIX_PATH_MAX, "%s/%s", path, msg);
     if (stat (full, &sb) == -1 && errno == ENOENT) return;
   }