diff --git a/NEWS b/NEWS
index 53dc75d307..6d6f9acf90 100644
--- a/NEWS
+++ b/NEWS
@@ -37,7 +37,7 @@ with all sufficient information, see the ChangeLog file.
     * extended method:
       * Kernel#warn accepts multiple args in like puts.
       * Kernel#caller accepts second optional argument `n' which specify
-	required caller size.
+        required caller size.
     * incompatible changes:
       * system() and exec() closes non-standard file descriptors
         (The default of :close_others option is changed to true by default.)