diff --git a/system/libraries/Validation.php b/system/libraries/Validation.php
index 065e7a2..f9b51d7 100644
--- a/system/libraries/Validation.php
+++ b/system/libraries/Validation.php
@@ -524,7 +524,7 @@
 	 */	
 	function numeric($str)
 	{
-		return ( ! is_numeric($str)) ? FALSE : TRUE;
+		return ( ! ereg("^[0-9]+$", $str)) ? FALSE : TRUE;
 	}
 	
 	// --------------------------------------------------------------------