--- lib-src/movemail.c.str	2009-04-13 11:42:22.000000000 +0200
+++ lib-src/movemail.c	2009-04-13 11:42:35.000000000 +0200
@@ -626,7 +626,7 @@
   else if (s2)
     fprintf (stderr, s1, s2);
   else
-    fprintf (stderr, s1);
+    fprintf (stderr, "%s", s1);
   fprintf (stderr, "\n");
 }