diff -up authd-1.4.3/authd.c.valist authd-1.4.3/authd.c
--- authd-1.4.3/authd.c.valist	2008-05-21 14:55:30.000000000 +0200
+++ authd-1.4.3/authd.c	2008-05-21 14:56:34.000000000 +0200
@@ -80,13 +80,16 @@ static void log_printf(int level, const 
     if (opt.debug || level != LOG_DEBUG) {
         va_list ap;
 
-        va_start(ap, s);
         if (s == NULL || *s == '\0') {
             s = strerror(errno);
             assert(strchr(s, '%') == NULL);
         }
-        if (opt.log)
+        if (opt.log) {
+            va_start(ap, s);
             vsyslog(level, s, ap);
+            va_end(ap);
+        }
+        va_start(ap, s);
         if (vfprintf(level == LOG_INFO ? stdout : stderr, s, ap) < 0) {
             perror(program_invocation_name);
             level = INT_MIN;