diff --git a/localedata/ChangeLog b/localedata/ChangeLog
index 5e02534758..bfb384d9e4 100644
--- a/localedata/ChangeLog
+++ b/localedata/ChangeLog
@@ -1,5 +1,9 @@
 2009-10-29  Ulrich Drepper  <drepper@redhat.com>
 
+	* locales/POSIX: Define yesstr and nostr.
+	* locales/en_US: Likewise.
+	Patch by Petr Machata <pmachata@redhat.com>.
+
 	* locales/crh_UA: Fix first day of week and a few spellings.
 	Patch by Režat SABIQ <tilde.birlik@gmail.com>.
 
diff --git a/localedata/locales/POSIX b/localedata/locales/POSIX
index 00c5b4a0d6..457ce6ec64 100644
--- a/localedata/locales/POSIX
+++ b/localedata/locales/POSIX
@@ -328,4 +328,8 @@ LC_MESSAGES
 yesexpr "<U005E><U005B><U0079><U0059><U005D>"
 #
 noexpr  "<U005E><U005B><U006E><U004E><U005D>"
+#
+yesstr  "<U0059><U0065><U0073>"
+#
+nostr   "<U004E><U006F>"
 END LC_MESSAGES
diff --git a/localedata/locales/en_US b/localedata/locales/en_US
index 38425e815e..a41f5bc310 100644
--- a/localedata/locales/en_US
+++ b/localedata/locales/en_US
@@ -132,6 +132,8 @@ END LC_TIME
 LC_MESSAGES
 yesexpr "<U005E><U005B><U0079><U0059><U005D><U002E><U002A>"
 noexpr  "<U005E><U005B><U006E><U004E><U005D><U002E><U002A>"
+yesstr  "<U0059><U0065><U0073>"
+nostr   "<U004E><U006F>"
 END LC_MESSAGES
 
 LC_PAPER