diff --git a/log.c b/log.c
index f0287e4..ff7346f 100644
--- a/log.c
+++ b/log.c
@@ -107,28 +107,37 @@ void
 log_msg(enum log_class log_class, const char *module,
         const char *file, int lineno, const char *fmt, ...)
 {
-    va_list ap;
-    va_start(ap, fmt);
-    _log(log_class, module, file, lineno, fmt, 0, ap);
-    va_end(ap);
+    va_list ap1, ap2;
+    va_start(ap1, fmt);
+    va_copy(ap2, ap1);
+    _log(log_class, module, file, lineno, fmt, 0, ap1);
+    _sys_log(log_class, module, file, lineno, fmt, 0, ap2);
+    va_end(ap1);
+    va_end(ap2);
 }
 
 void log_errno(enum log_class log_class, const char *module,
                const char *file, int lineno,
                const char *fmt, ...)
 {
-    va_list ap;
-    va_start(ap, fmt);
-    _log(log_class, module, file, lineno, fmt, errno, ap);
-    va_end(ap);
+    va_list ap1, ap2;
+    va_start(ap1, fmt);
+    va_copy(ap2, ap1);
+    _log(log_class, module, file, lineno, fmt, errno, ap1);
+    _sys_log(log_class, module, file, lineno, fmt, errno, ap2);
+    va_end(ap1);
+    va_end(ap2);
 }
 
 void log_errno_provided(enum log_class log_class, const char *module,
                         const char *file, int lineno, int _errno,
                         const char *fmt, ...)
 {
-    va_list ap;
-    va_start(ap, fmt);
-    _log(log_class, module, file, lineno, fmt, _errno, ap);
-    va_end(ap);
+    va_list ap1, ap2;
+    va_start(ap1, fmt);
+    va_copy(ap2, ap1);
+    _log(log_class, module, file, lineno, fmt, _errno, ap1);
+    _sys_log(log_class, module, file, lineno, fmt, _errno, ap2);
+    va_end(ap1);
+    va_end(ap2);
 }