diff --git a/system/core/Input.php b/system/core/Input.php
index 6e6885992f8..9a21c61f04f 100755
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -530,7 +530,7 @@ protected function _clean_input_data($str)
 		}
 
 		// Remove control characters
-		$str = remove_invisible_characters($str);
+		$str = remove_invisible_characters($str, false);
 
 		// Should we filter the input data?
 		if ($this->_enable_xss === TRUE)