diff --git a/ChangeLog b/ChangeLog
index 8041f2b9ce..9550be8e5d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Mar  3 15:54:20 2010  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* lib/matrix.rb (Vector#each2, collect2): small refactoring.
+
 Wed Mar  3 16:14:24 2010  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* lib/matrix.rb (Vector#each): make Vector enumerable.  
diff --git a/lib/matrix.rb b/lib/matrix.rb
index a008182c42..3f27bcaeef 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -1170,7 +1170,7 @@ class Vector
   def collect2(v) # :yield: e1, e2
     Vector.Raise ErrDimensionMismatch if size != v.size
     return to_enum(:collect2, v) unless block_given?
-    (0 ... size).collect do |i|
+    size.times.collect do |i|
       yield @elements[i], v[i]
     end
   end