Index: ssmtp-2.61/arpadate.c
===================================================================
--- ssmtp-2.61.orig/arpadate.c	2007-08-30 20:56:56.000000000 +0200
+++ ssmtp-2.61/arpadate.c	2007-08-30 20:56:56.000000000 +0200
@@ -79,7 +79,7 @@
 	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);