diff --git a/yaml.html.markdown b/yaml.html.markdown
index 8683971e37..09c5dfc511 100644
--- a/yaml.html.markdown
+++ b/yaml.html.markdown
@@ -121,7 +121,7 @@ other_anchor: *anchor_name
 base: &base
   name: Everyone has same name
 
-# The regexp << is called Merge Key Language-Independent Type. It is is used to
+# The regexp << is called Merge Key Language-Independent Type. It is used to
 # indicate that all the keys of one or more specified maps should be inserted
 # into the current map.