diff --git a/core/includes/errors.inc b/core/includes/errors.inc
index 05542a3..39d8ffd 100644
--- a/core/includes/errors.inc
+++ b/core/includes/errors.inc
@@ -120,9 +120,10 @@ function error_displayable($error = NULL) {
  *   with the exception of @message, which needs to be an HTML string, and
  *   backtrace, which is a standard PHP backtrace.
  * @param bool $fatal
- *   An error is fatal in case:
+ *  TRUE for:
  *   - An exception is thrown and not caught by something else.
  *   - A recoverable fatal error, which is a fatal error.
+ *  Non-recoverable fatal errors cannot be logged by Drupal.
  */
 function _drupal_log_error($error, $fatal = FALSE) {
   $is_installer = drupal_installation_attempted();