diff --git a/libraries/adodb_vtigerfix/adodb-xmlschema.inc.php b/libraries/adodb_vtigerfix/adodb-xmlschema.inc.php
index 65b016360fd293310229024f41cbf8f00bb1e561..62292ae0140473497b29db70dad31feea3f90e37 100644
--- a/libraries/adodb_vtigerfix/adodb-xmlschema.inc.php
+++ b/libraries/adodb_vtigerfix/adodb-xmlschema.inc.php
@@ -136,7 +136,7 @@ class dbObject {
 	*
 	* @access private
 	*/
-	function _tag_open( &$parser, $tag, $attributes ) {
+	function _tag_open( $parser, $tag, $attributes ) {
 
 	}
 
@@ -145,7 +145,7 @@ class dbObject {
 	*
 	* @access private
 	*/
-	function _tag_cdata( &$parser, $cdata ) {
+	function _tag_cdata( $parser, $cdata ) {
 
 	}
 
@@ -154,7 +154,7 @@ class dbObject {
 	*
 	* @access private
 	*/
-	function _tag_close( &$parser, $tag ) {
+	function _tag_close( $parser, $tag ) {
 
 	}
 
@@ -272,7 +272,7 @@ class dbTable extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_open( &$parser, $tag, $attributes ) {
+	function _tag_open( $parser, $tag, $attributes ) {
 		$this->currentElement = strtoupper( $tag );
 
 		switch( $this->currentElement ) {
@@ -331,7 +331,7 @@ class dbTable extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_cdata( &$parser, $cdata ) {
+	function _tag_cdata( $parser, $cdata ) {
 		switch( $this->currentElement ) {
 			// Table constraint
 			case 'CONSTRAINT':
@@ -355,7 +355,7 @@ class dbTable extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_close( &$parser, $tag ) {
+	function _tag_close( $parser, $tag ) {
 		$this->currentElement = '';
 
 		switch( strtoupper( $tag ) ) {
@@ -685,7 +685,7 @@ class dbIndex extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_open( &$parser, $tag, $attributes ) {
+	function _tag_open( $parser, $tag, $attributes ) {
 		$this->currentElement = strtoupper( $tag );
 
 		switch( $this->currentElement ) {
@@ -712,7 +712,7 @@ class dbIndex extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_cdata( &$parser, $cdata ) {
+	function _tag_cdata( $parser, $cdata ) {
 		switch( $this->currentElement ) {
 			// Index field name
 			case 'COL':
@@ -728,7 +728,7 @@ class dbIndex extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_close( &$parser, $tag ) {
+	function _tag_close( $parser, $tag ) {
 		$this->currentElement = '';
 
 		switch( strtoupper( $tag ) ) {
@@ -827,7 +827,7 @@ class dbData extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_open( &$parser, $tag, $attributes ) {
+	function _tag_open( $parser, $tag, $attributes ) {
 		$this->currentElement = strtoupper( $tag );
 
 		switch( $this->currentElement ) {
@@ -849,7 +849,7 @@ class dbData extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_cdata( &$parser, $cdata ) {
+	function _tag_cdata( $parser, $cdata ) {
 		switch( $this->currentElement ) {
 			// Index field name
 			case 'F':
@@ -865,7 +865,7 @@ class dbData extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_close( &$parser, $tag ) {
+	function _tag_close( $parser, $tag ) {
 		$this->currentElement = '';
 
 		switch( strtoupper( $tag ) ) {
@@ -1045,7 +1045,7 @@ class dbQuerySet extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_open( &$parser, $tag, $attributes ) {
+	function _tag_open( $parser, $tag, $attributes ) {
 		$this->currentElement = strtoupper( $tag );
 
 		switch( $this->currentElement ) {
@@ -1067,7 +1067,7 @@ class dbQuerySet extends dbObject {
 	/**
 	* XML Callback to process CDATA elements
 	*/
-	function _tag_cdata( &$parser, $cdata ) {
+	function _tag_cdata( $parser, $cdata ) {
 		switch( $this->currentElement ) {
 			// Line of queryset SQL data
 			case 'QUERY':
@@ -1083,7 +1083,7 @@ class dbQuerySet extends dbObject {
 	*
 	* @access private
 	*/
-	function _tag_close( &$parser, $tag ) {
+	function _tag_close( $parser, $tag ) {
 		$this->currentElement = '';
 
 		switch( strtoupper( $tag ) ) {