diff --git a/ChangeLog b/ChangeLog
index 4e28a73733..ba22e42bd3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Apr 13 17:12:09 2012  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* hash.c (inspect_i): keep string's coderange.
+
 Fri Apr 13 15:26:51 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* hash.c (rb_hash_aset, rb_hash_update, rb_hash_update_by): use
diff --git a/hash.c b/hash.c
index 28a3d00a42..f5d8e8d005 100644
--- a/hash.c
+++ b/hash.c
@@ -1392,14 +1392,14 @@ inspect_i(VALUE key, VALUE value, VALUE str)
 
     str2 = rb_inspect(key);
     if (RSTRING_LEN(str) > 1) {
-	rb_str_cat2(str, ", ");
+	rb_str_buf_cat_ascii(str, ", ");
     }
     else {
 	rb_enc_copy(str, str2);
     }
     rb_str_buf_append(str, str2);
     OBJ_INFECT(str, str2);
-    rb_str_buf_cat2(str, "=>");
+    rb_str_buf_cat_ascii(str, "=>");
     str2 = rb_inspect(value);
     rb_str_buf_append(str, str2);
     OBJ_INFECT(str, str2);