diff --git a/pt-br/asymptotic-notation-pt.html.markdown b/pt-br/asymptotic-notation-pt.html.markdown
index c89fb622..2e299d09 100644
--- a/pt-br/asymptotic-notation-pt.html.markdown
+++ b/pt-br/asymptotic-notation-pt.html.markdown
@@ -5,6 +5,7 @@ contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
 translators:
     - ["João Farias", "https://github.com/JoaoGFarias"]
+lang: pt-br
 ---
 
 # Notação Assintótica