diff --git a/tzdata-2009o-argentinas.patch b/tzdata-2009o-argentinas.patch
index ce0b100..aeaab7c 100644
--- a/tzdata-2009o-argentinas.patch
+++ b/tzdata-2009o-argentinas.patch
@@ -1,14 +1,9 @@
---- tzdata2009o/southamerica~	2009-10-16 13:23:49.000000000 +0000
-+++ tzdata2009o/southamerica	2009-10-16 13:24:14.000000000 +0000
-@@ -215,9 +215,14 @@
- # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
+diff -ur tzdata2009n/southamerica tzdata2009n_MODIF/southamerica
+--- tzdata2009o/southamerica	2009-09-22 16:13:38.000000000 -0300
++++ tzdata2009o/southamerica	2009-10-16 13:09:53.000000000 -0300
+@@ -216,8 +216,8 @@
  # </a>
  
-+# Margarita Manterola:
-+# Same as always, Argentina's government just decided to change its mind
-+# regarding DST, 2 days in advance.
-+# http://www.lanacion.com.ar/nota.asp?nota_id=1186963&pid=7542694&toi=6275
-+
  Rule	Arg	2007	only	-	Dec	30	0:00	1:00	S
 -Rule	Arg	2008	max	-	Mar	Sun>=15	0:00	0	-
 -Rule	Arg	2008	max	-	Oct	Sun>=15	0:00	1:00	S
@@ -17,3 +12,25 @@
   
  # From Mariano Absatz (2004-05-21):
  # Today it was officially published that the Province of Mendoza is changing
+@@ -428,6 +428,11 @@
+ # "Mar del Plata doesn't want to change the time"
+ # (less definitive than "is not to").
+ 
++
++Rule	SanLuis	2008	max	-	Mar	Sun>=8	0:00	0	-
++Rule	SanLuis	2008	max	-	Oct	Sun>=8	0:00	1:00	S
++ 
++
+ # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+ #
+ # Buenos Aires (BA), Capital Federal (CF),
+@@ -574,8 +579,7 @@
+ 			-3:00	-	ART	2004 May 31
+ 			-4:00	-	WART	2004 Jul 25
+ 			-3:00	Arg	AR%sT	2008 Jan 21
+-			-3:00	-	ART	2009 Mar 15
+-			-4:00	Arg	WAR%sT
++			-4:00	SanLuis	WAR%sT
+ #
+ # Santa Cruz (SC)
+ Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
diff --git a/tzdata.spec b/tzdata.spec
index 5356ef1..04cd912 100644
--- a/tzdata.spec
+++ b/tzdata.spec
@@ -3,7 +3,7 @@ Name: tzdata
 Version: 2009o
 %define tzdata_version 2009o
 %define tzcode_version 2009k
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: Public Domain
 Group: System Environment/Base
 URL: ftp://elsie.nci.nih.gov/pub/
@@ -113,6 +113,9 @@ rm -rf %{buildroot}
 %{_datadir}/javazi
 
 %changelog
+* Wed Oct 21 2009 Petr Machata <pmachata@redhat.com> - 2009o-2
+- San Luis (Argentina) entered DST on October 11 (tzdata-2009o-argentinas.patch)
+
 * Mon Oct 19 2009 Petr Machata <pmachata@redhat.com> - 2009o-1
 - Upstream 2009o
   - Bangladesh won't go back to Standard Time from October 1, 2009