1 files changed, 1 insertions, 0 deletions
diff --git a/INSTALL b/INSTALL
index f343c8228..92b8bee0d 100644
--- a/INSTALL
+++ b/INSTALL
@@ -76,6 +76,7 @@ REQUIREMENTS
 * The Apache Webserver
 * .htaccess support allowing overrides for DirectoryIndex
 * PHP Version 4.3.1 or greater
+* PCRE (perl compatible regular expression) installed with PHP
 * php.ini options:
    - error_reporting E_ALL & ~E_NOTICE (or lower)
    - file_uploads on (for attachment upload features)