diff --git a/ChangeLog b/ChangeLog
index d4981ebe79..fb176272a3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Feb 18 23:27:00 2012  Kenta Murata  <mrkn@mrkn.jp>
+
+	* random.c: remove a duplicated comment.
+
 Sat Feb 18 18:43:13 2012  Tanaka Akira  <akr@fsij.org>
 
 	* ext/dbm/extconf.rb (dblib): prefer recent GDBM over older GDBM.
diff --git a/random.c b/random.c
index 36b45a5fe5..d5a2dd81ba 100644
--- a/random.c
+++ b/random.c
@@ -215,8 +215,6 @@ genrand_real2(struct MT *mt)
 #undef N
 #undef M
 
-/* These real versions are due to Isaku Wada, 2002/01/09 added */
-
 typedef struct {
     VALUE seed;
     struct MT mt;