diff --git a/ChangeLog b/ChangeLog
index 96ed3b7070..9edb0240a7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Jun 18 10:00:06 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* safe.c: removed needless doc related $SAFE=3
+
 Thu Jun 18 09:59:23 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
 
 	* safe.c: rename old method name for $SAFE=3
diff --git a/safe.c b/safe.c
index 6be059e4c9..73d861d760 100644
--- a/safe.c
+++ b/safe.c
@@ -13,7 +13,6 @@
    0 - strings from streams/environment/ARGV are tainted (default)
    1 - no dangerous operation by tainted value
    2 - process/file operations prohibited
-   3 - all generated objects are tainted
 */
 
 #define SAFE_LEVEL_MAX RUBY_SAFE_LEVEL_MAX