diff --git a/ChangeLog b/ChangeLog
index 0275d14bfd..aca82bc613 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jun 11 19:11:22 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* ext/zlib/zlib.c: Fix indentation for rdoc.
+	  [Bug #11221][ruby-core:69465]
+
 Thu Jun 11 16:23:37 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* method.h (METHOD_ENTRY_BASIC_SET): fix last commit (unbalanced parens).
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 564f5c83ca..d5191dd970 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -1852,7 +1852,7 @@ rb_inflate_s_allocate(VALUE klass)
  *   Have inflate use the window size from the zlib header of the compressed
  *   stream.
  *
- * (8..15)
+ * (8..15)::
  *   Overrides the window size of the inflate header in the compressed stream.
  *   The window size must be greater than or equal to the window size of the
  *   compressed stream.