diff --git a/src/DBManager.php b/src/DBManager.php
index 44bd5ef..89e0d3d 100644
--- a/src/DBManager.php
+++ b/src/DBManager.php
@@ -498,7 +498,7 @@ public function update($row, $where='', $limit=-1, $updated_by='', $table='')
 			if(!empty($where))
 			{
 				// ID found
-				if(ctype_digit($where))
+				if(is_numeric($where))
 				{
 					$where_dyn[] = "`ID` = {$where}";
 				}
@@ -604,7 +604,7 @@ public function delete($where, $limit=-1, $deleted_by='', $table='')
 			{
 				$sql .= " WHERE ";
 				
-				if(ctype_digit($where))
+				if(is_numeric($where))
 				{
 					$sql .= " ID = {$where} ";
 				}