2 files changed, 3 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index bc7d096752..11df1e0b59 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,6 +6,9 @@ Sat May 10 22:14:03 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 	* string.c (tr_trans): should check src size, not str size.
 	  [ruby-dev:34637]
 
+	* string.c (tr_trans): should not turn on modify flag if no
+	  modification happens.  [ruby-dev:34631]
+
 Sat May 10 18:11:18 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* string.c (rb_str_each_line): zero length record separator should
diff --git a/string.c b/string.c
index 1de91ff525..f21baed251 100644
--- a/string.c
+++ b/string.c
@@ -4331,7 +4331,6 @@ tr_trans(VALUE str, VALUE src, VALUE repl, int sflag)
 	    }
 	    else {
 		save = -1;
-		modify = 1;
 		c = c0;
 	    }
 	    while (t - buf + tlen >= max) {