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-rw-r--r--roundcubemail/INSTALL1
1 files changed, 1 insertions, 0 deletions
diff --git a/roundcubemail/INSTALL b/roundcubemail/INSTALL
index f343c8228..92b8bee0d 100644
--- a/roundcubemail/INSTALL
+++ b/roundcubemail/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)