diff --git a/pg4wp/driver_pgsql.php b/pg4wp/driver_pgsql.php
index 7d470db..38ed7fd 100644
--- a/pg4wp/driver_pgsql.php
+++ b/pg4wp/driver_pgsql.php
@@ -151,6 +151,10 @@
 			$pattern = '/DATE_ADD[ ]*\(([^,]+),([^\)]+)\)/';
 			$sql = preg_replace( $pattern, '($1 + $2)', $sql);
 			
+			// UNIX_TIMESTAMP in MYSQL returns an integer
+			$pattern = '/UNIX_TIMESTAMP\(([^\)])\)';
+			$sql = preg_replace( $pattern, 'ROUND(DATE_PART(\'epoch\',$1))', $sql);
+			
 			$date_funcs = array(
 				'YEAR('			=> 'EXTRACT(YEAR FROM ',
 				'MONTH('		=> 'EXTRACT(MONTH FROM ',
diff --git a/readme.txt b/readme.txt
index 3824d07..506aece 100644
--- a/readme.txt
+++ b/readme.txt
@@ -50,6 +50,7 @@ There is no screenshot for this plugin
 
 == Changelog ==
 
+* Added UNIX_TIMESTAMP support
 * Added DAYOFMONTH support (Thanks to Pete Deffendol for noticing the problem)
 * Upgrading from WP 2.8.6 to WP 2.9.1 works with a minor error
 	Upgrading should remove an index on table "wp_options" that may not exist, throwing an error