diff --git a/ChangeLog b/ChangeLog
index 84decffa29..bb52861b92 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Apr 25 01:03:03 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* string.c (rb_to_id): remove unused variable.
+
 Sun Apr 24 22:19:05 2011  Tadayoshi Funaba  <tadf@dotrb.org>
 
 	* complex.c, rational.c: omitted some method calls.
diff --git a/string.c b/string.c
index 1f02ebff49..47429acefc 100644
--- a/string.c
+++ b/string.c
@@ -7678,7 +7678,6 @@ ID
 rb_to_id(VALUE name)
 {
     VALUE tmp;
-    ID id;
 
     switch (TYPE(name)) {
       default:
@@ -7696,7 +7695,7 @@ rb_to_id(VALUE name)
       case T_SYMBOL:
 	return SYM2ID(name);
     }
-    return id;
+    return Qnil; /* not reached */
 }
 
 /*