diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 24b2d1f..296ddb9 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -855,14 +855,14 @@
 		{
 			return $this->_error_messages[$rule];
 		}
-		elseif (FALSE !== ($tmp = $this->CI->lang->line('form_validation_'.$rule)))
+		elseif (FALSE !== ($line = $this->CI->lang->line('form_validation_'.$rule)))
 		{
-			return $tmp;
+			return $line;
 		}
 		// DEPRECATED support for non-prefixed keys, lang file again
-		elseif (FALSE !== ($tmp = $this->CI->lang->line($rule, FALSE)))
+		elseif (FALSE !== ($line = $this->CI->lang->line($rule, FALSE)))
 		{
-			return $tmp;
+			return $line;
 		}
 
 		return $this->CI->lang->line('form_validation_error_message_not_set').'('.$rule.')';