diff -ruN ssmtp-2.60-old/arpadate.c ssmtp-2.60-new/arpadate.c
--- ssmtp-2.60-old/arpadate.c	2002-12-08 18:30:11.000000000 +0100
+++ ssmtp-2.60-new/arpadate.c	2004-05-23 18:54:32.000000000 +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);
 
