diff --git a/README.md b/README.md
index aec9c32..b683df1 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,9 @@ Contributing to rebar
 Coding style
 ------------
 
-Avoid introducing trailing whitespace.
+Do not introduce trailing whitespace.
+
+Do not introduce lines longer than 80 characters.
 
 ### Indentation