diff --git a/CONTRIBUTIONS.md b/CONTRIBUTIONS.md
index 34d1d970..ba03583b 100644
--- a/CONTRIBUTIONS.md
+++ b/CONTRIBUTIONS.md
@@ -35,4 +35,5 @@ company name and/or your e-mail address).
 To ensure all pull requests can be easily checked and merged, here are some tips:
 * Your code should work on other platforms running the bourne shell (/bin/sh), not just BASH.
 * Properly document your code where needed. Besides the 'what', focus on explaining the 'why'.
-* Check the log information (lynis.log) of your new test or changed code, so that it provides helpful details for others.
\ No newline at end of file
+* Check the log information (lynis.log) of your new test or changed code, so that it provides helpful details for others.
+* Most variables should be capitalized, with underscore as word separator (e.g. PROCESS_EXISTS=1)
\ No newline at end of file