Index: DataDict/Pgsql.php
===================================================================
--- DataDict/Pgsql.php	(revision 7696)
+++ DataDict/Pgsql.php	(working copy)
@@ -649,6 +649,7 @@
             return $name . ' ' . $this->getNativeDeclaration($field);
         }
 
+        $unique = (isset($field['unique']) && $field['unique']) ? ' UNIQUE' : '';
         $default = '';
         if (array_key_exists('default', $field)) {
             if ($field['default'] === '') {
@@ -668,7 +669,7 @@
 
         $notnull = empty($field['notnull']) ? '' : ' NOT NULL';
         $name = $this->conn->quoteIdentifier($name, true);
-        return $name . ' ' . $this->getNativeDeclaration($field) . $default . $notnull;
+        return $name . ' ' . $this->getNativeDeclaration($field) . $default . $unique . $notnull;
     }
 
     /**