diff --git a/docs/code_contribution_guidelines.md b/docs/code_contribution_guidelines.md
index 1a0a8878f..4acab984c 100644
--- a/docs/code_contribution_guidelines.md
+++ b/docs/code_contribution_guidelines.md
@@ -461,6 +461,9 @@ Rejoice as you will now be listed as a [contributor](https://github.com/lightnin
 - [  ] Any new logging statements use an appropriate subsystem and
   logging level
 - [  ] Code has been formatted with `go fmt`
+- [  ] For code and documentation: lines are wrapped at 80 characters
+  (the tab character should be counted as 8 characters, not 4, as some IDEs do
+  per default)
 - [  ] Running `go test` does not fail any tests
 - [  ] Running `go vet` does not report any issues
 - [  ] Running [golint](https://github.com/golang/lint) does not