diff --git a/NEWS b/NEWS
index 6d0d2539..a3adf89a 100644
--- a/NEWS
+++ b/NEWS
@@ -24,6 +24,7 @@ NEWS ( CHANGELOG and HISTORY )                                     HTMLPurifier
     + HTMLPurifier_LanguageFactory::instance()
 # Printer_ConfigForm's get*() functions were static-ified
 ! Allow index to be false for config from form creation
+! Added HTMLPurifier::VERSION constant
 - InterchangeBuilder now alphabetizes its lists
 - Validation error in configdoc output fixed
 - Iconv and other encoding errors muted even with custom error handlers that
diff --git a/library/HTMLPurifier.php b/library/HTMLPurifier.php
index 135b9a0d..91008f42 100644
--- a/library/HTMLPurifier.php
+++ b/library/HTMLPurifier.php
@@ -58,7 +58,7 @@ class HTMLPurifier
     public $version = '3.1.0-dev';
     
     /** Constant with version of HTML Purifier */
-    const version = '3.1.0-dev';
+    const VERSION = '3.1.0-dev';
     
     /** Global configuration object */
     public $config;
diff --git a/release1-update.php b/release1-update.php
index 8f02c16b..20aa0bb7 100644
--- a/release1-update.php
+++ b/release1-update.php
@@ -78,8 +78,8 @@ if (!$c) {
     exit;
 }
 $htmlpurifier_c = preg_replace(
-    '/const version = \'.+?\';/',
-    "const version = '$version';",
+    '/const VERSION = \'.+?\';/',
+    "const VERSION = '$version';",
     $htmlpurifier_c,
     1, $c
 );