diff --git a/ruby.html.markdown b/ruby.html.markdown
index 2635309b..2595d1d5 100644
--- a/ruby.html.markdown
+++ b/ruby.html.markdown
@@ -377,7 +377,7 @@ sum sum(3, 4), 5 #=> 12
 
 # yield
 # All methods have an implicit, optional block parameter.
-# Tt can be called with the 'yield' keyword.
+# It can be called with the 'yield' keyword.
 def surround
   puts '{'
   yield