diff --git a/library/Zend/Db/Select.php b/library/Zend/Db/Select.php
index 892281127b..6de561dae8 100644
--- a/library/Zend/Db/Select.php
+++ b/library/Zend/Db/Select.php
@@ -515,7 +515,7 @@ public function group($spec)
         }
 
         foreach ($spec as $val) {
-            if (preg_match('/^[\w]*\([^\)]*\)$/', (string) $val)) {
+            if (preg_match('/^([\w]*\(([^\)]|(?1))*\))$/', (string) $val)) {
                 $val = new Zend_Db_Expr($val);
             }
             $this->_parts[self::GROUP][] = $val;
@@ -607,7 +607,7 @@ public function order($spec)
                     $val = trim($matches[1]);
                     $direction = $matches[2];
                 }
-                if (preg_match('/^[\w]*\([^\)]*\)$/', $val)) {
+                if (preg_match('/^([\w]*\(([^\)]|(?1))*\))$/', (string) $val)) {
                     $val = new Zend_Db_Expr($val);
                 }
                 $this->_parts[self::ORDER][] = array($val, $direction);
@@ -949,7 +949,7 @@ protected function _tableCols($correlationName, $cols, $afterCorrelationName = n
                     $alias = $m[2];
                 }
                 // Check for columns that look like functions and convert to Zend_Db_Expr
-                if (preg_match('/^[\w]*\([^\)]*\)$/', $col)) {
+                if (preg_match('/^([\w]*\(([^\)]|(?1))*\))$/', (string) $col)) {
                     $col = new Zend_Db_Expr($col);
                 } elseif (preg_match('/(.+)\.(.+)/', $col, $m)) {
                     $currentCorrelationName = $m[1];