diff --git a/ChangeLog b/ChangeLog
index 51c2d9c386..af32670026 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Mar 25 11:20:40 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* benchmark/bm_hash_aref_flo.rb: make more realistic data.
+	  [ruby-core:68632] [[Bug #10999]
+
 Wed Mar 25 10:39:06 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* .document: removed needless entries.
diff --git a/benchmark/bm_hash_aref_flo.rb b/benchmark/bm_hash_aref_flo.rb
index a097bb5915..2217274c82 100644
--- a/benchmark/bm_hash_aref_flo.rb
+++ b/benchmark/bm_hash_aref_flo.rb
@@ -1,4 +1,4 @@
 h = {}
-strs = (1..10000).to_a.map!(&:to_f)
+strs = [*1..10000].map! {|i| i.fdiv(10)}
 strs.each { |s| h[s] = s }
 50.times { strs.each { |s| h[s] } }