diff --git a/bg/examples/i_love_ruby.md b/bg/examples/i_love_ruby.md
index eb6b1c74d2..a86bfeca1a 100644
--- a/bg/examples/i_love_ruby.md
+++ b/bg/examples/i_love_ruby.md
@@ -8,7 +8,7 @@ say = "I love Ruby"
 puts say
 
 # Output "I *LOVE* RUBY"
-say['love'] = "*love*"
+say = say.sub("love", "*love*")
 puts say.upcase
 
 # Output "I *love* Ruby"