--- ssmtp-2.61.orig/arpadate.c	2002-12-08 18:30:11.000000000 +0100
+++ ssmtp-2.61/arpadate.c	2011-01-17 15:09:18.000000000 +0100
@@ -79,7 +79,7 @@ get_arpadate (char *d_string)
 	time_t now;
 
 	/* RFC822 format string borrowed from GNU shellutils date.c */
-	const char *format = "%a, %_d %b %Y %H:%M:%S %z";
+	const char *format = "%a, %d %b %Y %H:%M:%S %z";
 
 	now = time(NULL);