diff --git a/config-dist.php b/config-dist.php
index 86d15ea..7902299 100644
--- a/config-dist.php
+++ b/config-dist.php
@@ -282,6 +282,16 @@ $CFG->admin = 'admin';
 // 
 // NOTE: if you are using custompix in your theme, see /fixpix.php.
 
+// If using Oracle, specify the characters to use as the decimal separator and
+// group separator. The decimal separator separates the integer portion of a
+// number from the decimal portion. The group separator separates integer groups
+// (that is, thousands, millions, billions, and so on). If not specified, Moodle
+// will use '.' as the decimal separator and ',' as the group separator by default.
+//
+// See http://download.oracle.com/docs/cd/B14117_01/server.101/b10755/initparams130.htm
+// for additional details.
+//     $CFG->oraclenlsnumchars = '.,';
+
 //=========================================================================
 // ALL DONE!  To continue installation, visit your main page with a browser
 //=========================================================================
diff --git a/lib/dmllib.php b/lib/dmllib.php
index baa96be..242e9c6 100644
--- a/lib/dmllib.php
+++ b/lib/dmllib.php
@@ -1957,6 +1957,10 @@ function configure_dbconnection() {
         /// No need to set charset. It must be specified by the NLS_LANG env. variable
         /// Enable sybase quotes, so addslashes and stripslashes will use "'"
             ini_set('magic_quotes_sybase', '1');
+        /// MDL-11629
+            $db->Execute("ALTER SESSION SET NLS_NUMERIC_CHARACTERS='" .
+                          (isset($CFG->oraclenlsnumchars) ? 
+                                 $CFG->oraclenlsnumchars : '.,') . "'");
         /// NOTE: Not 100% useful because GPC has been addslashed with the setting off
         ///       so IT'S MANDATORY TO ENABLE THIS UNDER php.ini or .htaccess for this DB
         ///       or to turn off magic_quotes to allow Moodle to do it properly