diff --git a/htdocs/core/db/pgsql.class.php b/htdocs/core/db/pgsql.class.php
index cce8d21610a..12e29d949c3 100644
--- a/htdocs/core/db/pgsql.class.php
+++ b/htdocs/core/db/pgsql.class.php
@@ -756,10 +756,10 @@ class DoliDBPgsql extends DoliDB
 	 *
 	 *	@param	string	$subject        string tested
 	 *	@param	string  $pattern        SQL pattern to match
-	 *	@param	string	$sqlstring      whether or not the string being tested is an SQL expression
+	 *	@param	int		$sqlstring      whether or not the string being tested is an SQL expression
 	 *	@return	string          		SQL string
 	 */
-	public function regexpsql($subject, $pattern, $sqlstring = false)
+	public function regexpsql($subject, $pattern, $sqlstring = 0)
 	{
 		if ($sqlstring) {
 			return "(". $subject ." ~ '" . $pattern . "')";
diff --git a/htdocs/core/lib/functions2.lib.php b/htdocs/core/lib/functions2.lib.php
index a64165b6952..3c5e697f91e 100644
--- a/htdocs/core/lib/functions2.lib.php
+++ b/htdocs/core/lib/functions2.lib.php
@@ -1274,7 +1274,7 @@ function get_next_value($db, $mask, $table, $field, $where = '', $objsoc = '', $
 	// To ensure that all variables within the MAX() brackets are integers
 	// This avoid bad detection of max when data are noised with non numeric values at the position of the numero
 	if (getDolGlobalInt('MAIN_NUMBERING_FILTER_ON_INT_ONLY')) {
-		$sql .= " AND ". $db->regexpsql($sqlstring, '^[0-9]+$', true);
+		$sql .= " AND ". $db->regexpsql($sqlstring, '^[0-9]+$', 1);
 	}
 
 	if ($bentityon) { // only if entity enable