diff --git a/report.c b/report.c

index 31d4e48..2a731ac 100644

--- ./report.c~

+++ ./report.c

@@ -238,11 +238,17 @@ report_build (FILE *errfp, message, va_alist)

     rep_ensuresize();

 #if defined(VA_START)

-    VA_START (args, message);

     for ( ; ; )

     {

+	/*

+	 * args has to be initialized before every call of vsnprintf(),

+	 * because vsnprintf() invokes va_arg macro and thus args is

+	 * undefined after the call.

+	 */

+	VA_START(args, message);

 	n = vsnprintf (partial_message + partial_message_size_used, partial_message_size - partial_message_size_used,

 		       message, args);

+	va_end (args);

 	if (n >= 0

 	    && (unsigned)n < partial_message_size - partial_message_size_used)

@@ -254,7 +260,6 @@ report_build (FILE *errfp, message, va_alist)

 	partial_message_size += 2048;

 	partial_message = REALLOC (partial_message, partial_message_size);

     }

-    va_end (args);

 #else

     for ( ; ; )

     {